every 7500
This
Same here. I figure split the difference between the 10k "normal" use spec, and the 5k "severe" spec.
every 7500
This
Man I’d like to see what the compression is on each cylinder on that tight a rig
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I plan on keeping my 4Runner for a very long time so I change my oil about every 5k. When I do change it I have them put in 6qt. I fill the remainder 0.6qt with Marvel Mystery Oil or Lucas.
About every 3rd or 4th oil change I use a engine flush. This is the stuff you put in your engine just before a oil change. I put it in at the oil changing place, let it idle for 5 min then change the oil.
Toyota has a history of oil sludge issues across many of its motors including occasionally the 4.0 V6. Toyota does appear to have addressed these issues, but extended oil changes over a long period of time doesn't help things at, regardless of engine. Most every tech and oil engineer would tell you to change the oil before 10K miles as the oil is likely out of grade and the potential exists for varnishing and sludge build up on the valvetrain.
As noted previously, my primary concern is the oil falling out of grade. If you do a lot of short distance driving (i.e. 15 mile or less), then fuel will build up in the oil as the oil rarely gets up to operating temp, thus the oil will degrade more quickly and fall out of grade. I've done used oil analysis on my 2016 BMW M235 with a 7 QT capacity running a very high quality and robust synthetic 0W-30. I've got three rounds of data that supports that shows the oil falls out of grade at ~7,500 miles.
Given the 4Runner's rather large capacity of 6.6 QTs though running a rather thin 0W-20, I would expect the oil will indicate that a 5,000-7,500 mile oil change would be recommended and the 10K is too long, especially if you do a lot of short distance driving and lots of stone cold starts in the winter
From my understanding Engine Flush products have a lot more detergent and are much stronger than ATF fluid. Most recommend that you add it just before your oil change and let your engine idle for 5 min. If you do drive it only do it for a very short distance. It’s primarily designed to break down the sludge so you can drain it out with the oil change but the Car Care Nut guy said they are also good at removing residue that can cause piston rings to stick which can damage you piston side walls and cause more oil burn. However, he only recommends using them every 3rd oil change or greater because the detergent chemicals are harsh on o-rings and seal and can eat away at them if used too frequently, thus causing other problems.
As for ATF fluid, yes I remember my mechanic back in the day recommending adding AFT fluid about 300-50 miles before a oil change to get rid of your sludge and gunk build up. I think products like Marvel Mystery Oil performs somewhat the same way in that its designed to keep your engine clean and prevent sludge, carbon and gunk build up but doesn't have a mileage limit. You can simply add it with every oil change.
So, does that accomplish the same as running an engine flush from a bottle for a few minutes immediately prior to your next oil change?
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I just got my 2015 limited.
I know the maintenance light came one. I got the oil change done and I reset the message. Should I change it out every 5k or should I wait for the message to pop up again?
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1st oil change was at 1500, 2nd was at 5k, every 5k from that point forward. May sound like an overkill, but I just don't see running up to 10k with a lot of city driving.
1st rear end oil change, 5k. Oil was black and thin and had a bit of metal debris on magnet. Looks like Toyota may have put in some sort of additive for break-in period. It was pretty nasty and smelled really bad.
My son works at a Toyota dealership and he changes my oil so I know its being done right.
I just got my 2015 limited.
I know the maintenance light came one. I got the oil change done and I reset the message. Should I change it out every 5k or should I wait for the message to pop up again?
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