Synthetic Vrs. Conventional in older 4runner

[Captsolo]

Give it some time.
scotty kilmer oil leak - Bing video

My 2005 4runner leaked a drip or two on synthetic, but changing back to conventional it doesn't leak a drop.

BTW Scott Kilmer made himself a millionaire with his mechanic skills. Why listen to all the turkeys on this website?

 

[phatcheeks]

Give it some time.
scotty kilmer oil leak - Bing video

My 2005 4runner leaked a drip or two on synthetic, but changing back to conventional it doesn't leak a drop.

BTW Scott Kilmer made himself a millionaire with his mechanic skills. Why listen to all the turkeys on this website?

Its leaking because you have a bad gasket somewhere.

 

[triethylborane]

Give it some time.
scotty kilmer oil leak - Bing video

My 2005 4runner leaked a drip or two on synthetic, but changing back to conventional it doesn't leak a drop.

BTW Scott Kilmer made himself a millionaire with his mechanic skills. Why listen to all the turkeys on this website?

In the video he says hes talked to engineers that say its impossible, then just goes off his own experience of synthetic causing leaks in old engines to counter the statement. This is not a strong argument for your position. Besides, Scotty does confine it to old engines, like that old Celica and even so he does note he is going against the advice of the engineers. Engineers that, you know, just design and test synthetic oils. He's sort of dropping a hint about his position.

He probably did fine as a mechanic, but applying that to youtube and being ahead of the curve there is how he made serious money. Your appeal to authority is irrelevant.

Why are you even here if you dont want to listen (read) and have a conversation?

 

[ElDuck]

Give it some time.
scotty kilmer oil leak - Bing video

My 2005 4runner leaked a drip or two on synthetic, but changing back to conventional it doesn't leak a drop.

BTW Scott Kilmer made himself a millionaire with his mechanic skills. Why listen to all the turkeys on this website?

Scotty made millions making shotty videos with clickbait titles and annoying camera work. There's teenagers making hundreds of thousands of dollars playing Call Of Duty and letting people watch, does that mean they should be training our Special Forces then?

 

[Drcoffee]

What have done on my high mileage purchases is to add MMO to the conventional oil to clean out the carbon build up. Then switch to mobil1. If a leak at the rear main seal starts, I use AT205 which softens the seals and stops the leaks.

 

[Cascade4runner]

Don’t know if this helps, bought my 07 with 70,000 miles, switched to Mobile 1 full synthetic right after purchase, just rolled 120,000 miles and still looking good, no leaks. V6 I forgot to mention.

 

[y=mx+b]

Give it [head gasket] some time.
scotty kilmer oil leak - Bing video

How much time should I expect before synthetic oil causes my HG to go? Do you have any metrics, data, or a case study on synthetic oil causing HG leaks on 4runners?

Which oil passage causes the HG leak? I searched the subtitles of that scotty video, not a single sentence mentioned head gasket, so I'm curious where this information is coming from.

My 2005 4runner leaked a drip or two on synthetic, but changing back to conventional it doesn't leak a drop.

Where did it leak from? Valve cover, timing cover, crank seal, oil pan? In all seriousness, I'd be interested to hear where it was leaking from.

The original question here was asking for feedback on switching to synthetic oil in regards to leaks, but now you're denying everyone's first hand experience and calling us turkeys. Its totally fine for us to use synthetic and not have any leaks, and its totally fine for you to use conventional.

PDF attached as source of the Oil Flow Diagram

 

[JLTD]

I have a 2005 V6 4runner with the 4.0 and 150,000 miles. I switched oil two years ago to semisynthetic (from 12 years of conventional), but immediately developed oil leaks.

BUT... because I got oil leaks with synthetic... I drained the synthetic and switched back to dino / conventional and the oil leak slowed downed but did not entirely stop.

Now, two years later the oil leaks have totally stopped. I lay new cardboard down in the garage, and the new cardboard shows not a (new) drop in over a week.

No more synthetic oil for me.

Scotty Kilmer says the same on older cars. Synthetic oil causes oil leaks in older cars.
See Scotty right here talk about changing to synthetic. scotty kilmer oil leak - Bing video

Anyone else experience this issue? :hatsoff:

I have switched more than one vehicle over from dino to synthetic. Experienced some slight leakage right after changing, but those leaks went away within about 5,000 miles.

As I understand it, dino can leave some small deposits around seals. The seal hardens slightly underneath since it is no longer exposed to seal conditioners. As this layer is washed away by the synthetic, some oil gets by the seal - until the seal conditioners are able to do their thing at which point the seals begin to do their job again.

Curious how long you had the synthetic in?

 

[rwh963]

changed from conventional to full synthetic at 190k miles, no problems at 215k miles. nuff said!

 

[fefe_grn210]

FWIW I inherited my rig back in August with 205k on the odometer, immediately switched from conventional to synthetic and 1,400 miles later it has yet to leak a drop.

OTOH I had an E36 325is earlier this year that made the switch from synthetic-blend to synthetic and it immediately started leaving a few drops on the pavement when parked overnight, although all gaskets on that car were original ('95 w/ 102k miles).

IMO I don't believe it's as black-and-white as some make it out to be, I'd bet it ultimately depends on the condition of each engine (primarily the age and quality of the gaskets).

 

[firebirdguy]

Give it some time.
scotty kilmer oil leak - Bing video

My 2005 4runner leaked a drip or two on synthetic, but changing back to conventional it doesn't leak a drop.

BTW Scott Kilmer made himself a millionaire with his mechanic skills. Why listen to all the turkeys on this website?

"give it some time?" LOL! give it a rest! :der:

why do you keep posting that stupid video, he doesnt say anything about synthetic oil & head gaskets.... YOU made the ridiculous statement so YOU need to back it up. come'on, lets hear how you think synthetic oil will cause any type of head gasket issues? just one shred of info. still waiting....

& if you actually listen to what he says in the video, he doesnt say to not use synthetic, hes comparing expensive to cheap synthetics & ended up using the STP synthetic in the 200k+ mile toyota. he said "some" older engines can have issues but that is because of old/weak gaskets or loose bolts or a bad rear main seal etc.

& if you call members here that provide FACTS & clearly have about 100 times more automotive knowledge than you "turkeys"... why are you even here??? if you know it all then whats the point of crying & making childish insults when people try to help you or provide logic & reason to your delusional comments? just stop the insanity!

 

[firebirdguy]

changed from conventional to full synthetic at 190k miles, no problems at 215k miles. nuff said!

how is that possible... its "super slick" LOL!

 

[triethylborane]

OTOH I had an E36 325is earlier this year that made the switch from synthetic-blend to synthetic and it immediately started leaving a few drops on the pavement when parked overnight, although all gaskets on that car were original ('95 w/ 102k miles).

IMO I don't believe it's as black-and-white as some make it out to be, I'd bet it ultimately depends on the condition of each engine (primarily the age and quality of the gaskets).

This I do not doubt, the M50/52 is notorious for leaking from the valve cover gasket, the spark plug well gaskets and the oil filter housing gasket. The gaskets wear out at around 60-100k miles, with less use they tend to wear out quicker in my experience, but thats just my experience. BMW and BMW NA have long approved synthetic oil, including in the 90s. Ive been using Mobil 1 in other BMW I6s since then, even getting my hands on Wintershall and Castrol synthetics.

 

[Captsolo]

"give it some time?" LOL! give it a rest! :der:

why do you keep posting that stupid video, he doesnt say anything about synthetic oil & head gaskets.... YOU made the ridiculous statement so YOU need to back it up. come'on, lets hear how you think synthetic oil will cause any type of head gasket issues? just one shred of info. still waiting....

& if you actually listen to what he says in the video, he doesnt say to not use synthetic, hes comparing expensive to cheap synthetics & ended up using the STP synthetic in the 200k+ mile toyota. he said "some" older engines can have issues but that is because of old/weak gaskets or loose bolts or a bad rear main seal etc.

& if you call members here that provide FACTS & clearly have about 100 times more automotive knowledge than you "turkeys"... why are you even here??? if you know it all then whats the point of crying & making childish insults when people try to help you or provide logic & reason to your delusional comments? just stop the insanity!

You are a joke and misquote Scotty Kilmer and myself. Are you constipated? You need to find something for that.

Scotty has 50 years of mechanic experience. What's yourS?

https://www.linkedin.com/in/mrs-linda-veri-azzara-78a1b6136/

scotty kilmer oil leak - Bing video

After running conventional oil in my own 2005 4runner (4.0)(140,000 miles) I decided to try synthetic oil (blend with a quart of full synthetic). Within a few days, the 4runner which had never dripped a drop of oil onto the ground was dripping some.

I switched back to conventional (Napa 10W 40) and the drips slowed down but didn’t stop entirely. Now after a second oil change and 10 months later ALL the drips have stopped. I’ll stick with just conventional and change the oil every 5000 miles.

NOTE: I used a piece of cardboard on the garage floor to keep track of the drips.

MONTHS LATER: Now, after replacing the cardboard in my 2 car garage with a new piece 5 days ago I noticed there has not been even one drop SEEN in 5 days.

I have never added any additives or a stop leak to this Toyota engine. I do my own oil changes.

BTW. I live in a gated community with a house I built with cash ($560,000) that is now valued at three times that. The test with the cardboard proves that the synthetic caused my leaks and the switch back to conventional stopped the drips.

The 4runner had never leaked before the synthetic. Scotty Kilmer confirms that he sees "it all the time in older cars".

firebirdguy. You need to move on and delete your ignorant sites.:sniper:

 

[Bluesky 07]

The bottom line is that it doesn't matter. That's blasphemy to some but the differences between today's synthetic and conventional oil in protection, performance, and other parameters are likely so miniscule that they're insignificant in justifying the higher expense. Same between brands. We all want to believe that Mobil 1 or Royal Purple are better than SuperTech but the truth is that any oil that meets the manufacturer's specifications is going to be fine in your truck now and forever. I know, additives and such, and those are different but again, do they make a significant difference? Probably not. As long as you change it at appropriate intervals with oil that meets the specs, it doesn't matter what you put in it.

The same line of reasoning applies to gas. If the manual calls for 87 and you're not in unusual conditions (higher altitude for example), you're wasting money putting anything more than 87 in a vehicle. Try to find a manual that specifies 89 - they exist, but in 2018, only 10 models worldwide called for 89. That's because 89 primarily exists because marketing research shows that customers whose vehicles burn 87 will usually buy the cheapest gas if there are only two choices but will often choose the middle option when there are three. So 89 is nothing more than a way to separate people from a few more cents at the pump.

 

[firebirdguy]

You are a joke and misquote Scotty Kilmer and myself. Are you constipated? You need to find something for that.

Scotty has 50 years of mechanic experience. What's yourS?

https://www.linkedin.com/in/mrs-linda-veri-azzara-78a1b6136/

scotty kilmer oil leak - Bing video

After running conventional oil in my own 2005 4runner (4.0)(140,000 miles) I decided to try synthetic oil (blend with a quart of full synthetic). Within a few days, the 4runner which had never dripped a drop of oil onto the ground was dripping some.

I switched back to conventional (Napa 10W 40) and the drips slowed down but didn’t stop entirely. Now after a second oil change and 10 months later ALL the drips have stopped. I’ll stick with just conventional and change the oil every 5000 miles.

NOTE: I used a piece of cardboard on the garage floor to keep track of the drips.

MONTHS LATER: Now, after replacing the cardboard in my 2 car garage with a new piece 5 days ago I noticed there has not been even one drop SEEN in 5 days.

I have never added any additives or a stop leak to this Toyota engine. I do my own oil changes.

BTW. I live in a gated community with a house I built with cash ($560,000) that is now valued at three times that. The test with the cardboard proves that the synthetic caused my leaks and the switch back to conventional stopped the drips.

The 4runner had never leaked before the synthetic. Scotty Kilmer confirms that he sees "it all the time in older cars".

firebirdguy. You need to move on and delete your ignorant sites.:sniper:

im a joke? constipated? because i state FACTS that apparently hurt your feelings? based on your comments, you are either 12 years old or just drunk posting... read this thread & most others you post in, people are laughing AT you & not with you... but youre probably used to that huh? :rofl:

nobody cares about your boyfriend scotty kilmer... & i didnt misquote anything from you or him, this isnt about scotty its about you & your delusional posts. all you can do is resort to childish insults when you are losing an argument & cant back up your statements, which is typical of your kind. still waiting for your explanation on synthetic oil causing head gasket problems... whats the problem mr mechanic?? either back up that hilarious claim or just admit when youre wrong.

you keep repeating your synthetic leak story, think you need to work on your reading comprehension skills bud, numerous people in this thread told you why you had a leak & you still cant accept that. at first it was just synthetic blend you said you used, now its +1 qt of full synthetic? LOL! & you used 10/40 conventional when that is NOT the correct weight for the engine! tell us your "logic" on that one? shoot, why not use 20/50 along with your T-IV trans fluid???

& what "ignorant sites" do i need to delete??? what does that even mean? you need to seek some serious help for your delusional comments & keyboard warrior attitude! & BTW, nobody cares about your house, & its rather sad that you feel the need to compare yourself to others financially, there's lots of rich idiots in this world! you drive a 2005 sr5 that you cant even change the oil on correctly & you have to pay a dealership to change the trans fluid! LOL! how embarrassing for you! gobble gobble turkey!

 

[Captsolo]

im a joke? constipated? because i state FACTS that apparently hurt your feelings? based on your comments, you are either 12 years old or just drunk posting... read this thread & most others you post in, people are laughing AT you & not with you... but youre probably used to that huh? :rofl:

nobody cares about your boyfriend scotty kilmer... & i didnt misquote anything from you or him, this isnt about scotty its about you & your delusional posts. all you can do is resort to childish insults when you are losing an argument & cant back up your statements, which is typical of your kind. still waiting for your explanation on synthetic oil causing head gasket problems... whats the problem mr mechanic?? either back up that hilarious claim or just admit when youre wrong.

you keep repeating your synthetic leak story, think you need to work on your reading comprehension skills bud, numerous people in this thread told you why you had a leak & you still cant accept that. at first it was just synthetic blend you said you used, now its +1 qt of full synthetic? LOL! & you used 10/40 conventional when that is NOT the correct weight for the engine! tell us your "logic" on that one? shoot, why not use 20/50 along with your T-IV trans fluid???

& what "ignorant sites" do i need to delete??? what does that even mean? you need to seek some serious help for your delusional comments & keyboard warrior attitude! & BTW, nobody cares about your house, & its rather sad that you feel the need to compare yourself to others financially, there's lots of rich idiots in this world! you drive a 2005 sr5 that you cant even change the oil on correctly & you have to pay a dealership to change the trans fluid! LOL! how embarrassing for you! gobble gobble turkey!

Well I read your post and you are definitely a jerk and Constipated. Just go away AH.

 

[JLTD]

Finally had time to watch the video; what he said was he advises against changing to synthetic at high mileage and used 240,000 miles as an example. He said he'd "seen it too many times". The thing is, it's extremely variable -- both by vehicle and previous owner's maintenance habits.


Captsolo, I'll ask again - when you had the leaks, how many miles did you leave the synthetic in? Your initial post only said you changed it.

 

[Captsolo]

Finally had time to watch the gideo; he said he advises against changing to synthetic at high mileage and used 240,000 miles as an example. He said he'd "seen it too many times".

It's extremely variable -- both by vehicle and previous owner's maintenance habits.

Captsolo, I'll ask again - when you had the leaks, how many miles did you leave the synthetic in? Your initial post only said you changed it.

JLTD

I changed it right away. Less than a week. The leaking started right away from using synthetic.

In the prior 12 years of driving this 4runner there were no leaks on conventional oil, so when I suddenly got a few drips from driving with synthetic, it was obvious.

Since changing back to conventional oil there are no drips on the new cardboard we just laid down in the garage.

SK has 50 years of experience and claims 1 billion views.

I've "seen it too many times" - SK
"I wouldn't do it" - SK. Meaning switching to synthetic on an older vehicle.

scotty kilmer oil leak - Bing video

 

[DMX512]

Captsolo you sound like a petulant child.
I will disregard every single post you make.