Next: all diffs in Castrol Synthetic

jacal

jacal

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As I work to complete the 64000km toyota suggested maintenance, [$>300Cdn - no thanks guys! sidebar: I hate the way the initial price goes so much higher, i.e. charge for shop supplies, disposals (even just on parts not only oils!!)], the next task is synthetic gear oil in the 3 diffs.

Any reason NOT to use "Castrol Synthetic" 75w-90? I shopped around, but locally the choices in synth gear oil were very very limited. I could go lucas ($14/qt) or a selection of no-name (like wal-marts tech 2000). Castrol was $10/qt ~980ml. I could not find Mobile or Amsoil.

Castrol claims this is 100% synthetic. I've been using castrol synth motor oil in my snowthrower...seems okay so far, but my plug was half fouled after last winter (build up meaning running a bit rich).




J
 
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jacal said:
As I work to complete the 64000km toyota suggested maintenance, [$>300Cdn - no thanks guys!...)], the next task is synthetic gear oil in the 3 diffs.

I could not find Mobile...
Click to expand...

I recently did the same. I wanted to stick with Mobil but they don't sell much retail around here (must be a small Canadian market.) I could buy Mobil 75w90 at an ESSO quick lube but it was expensive (C$20/qt; without their service.) Look around town for an ESSO wholesaler/supplier (home heating oil; industrial lubes.) If they don't have it then they can order it. I bought 7 qts (946ml) because you need 6L. They had it in stock for C$11.16/qt. Do a forum search about diff fliuds. The pump and crush washer hints helped me do the job easier.
 
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Re: Re: Next: all diffs in Castrol Synthetic

Kmvreter said:
I recently did the same. I wanted to stick with Mobil but they don't sell much retail around here (must be a small Canadian market.) I could buy Mobil 75w90 at an ESSO quick lube but it was expensive (C$20/qt; without their service.) Look around town for an ESSO wholesaler/supplier (home heating oil; industrial lubes.) If they don't have it then they can order it. I bought 7 qts (946ml) because you need 6L. They had it in stock for C$11.16/qt. Do a forum search about diff fliuds. The pump and crush washer hints helped me do the job easier.
Click to expand...


Are you satisfied running 75w-90 all around despite the specs of 80w for -18C and below (which I know you get on occasion in ON)??? Is this a bigger issue for me in MB where -18C will be the norm for a few months?

Why doesn't this make sense to me: 80w should be heavier, which should be worse at lower temps? Or did I mis-read something?

PS: crush washers are on hand, and I bought a $10 gear oil pump at Princess Auto. Thanks for the hints & help!


J
 
Re: Re: Re: Next: all diffs in Castrol Synthetic

jacal said:
Are you satisfied running 75w-90 all around despite the specs of 80w for -18C and below (which I know you get on occasion in ON)??? Is this a bigger issue for me in MB where -18C will be the norm for a few months?

Why doesn't this make sense to me: 80w should be heavier, which should be worse at lower temps? Or did I mis-read something?

PS: crush washers are on hand, and I bought a $10 gear oil pump at Princess Auto. Thanks for the hints & help!


J
Click to expand...

On average you are colder than where I am. I believe 75w90 is spec'd for either the front or trans case with the rear being 80w90 (don't have the book handy.) You're right, 80 is thicker so I'm comfortable putting 75w90 because it is "relatively" thinner at lower temps (they are both borderline molassas in the cold.) I figure it can't hurt. They both top at 90 at running temp which is still low on really cold days.
No matter what you get or how careful you are, it will smell and you'll spill/overflow some. Take your time.
Are you still looking at Mobil brand?
 
I will stick to the 75w-90 all around. It makes no sense to go thicker knowing that ultimately winter will return.

I will go with Castrol Syntec. I checked out the www site, they make all the marketing claims everyone else does (very reasuring), they were ok price wise, and they were available at Wal Mart. I bought 7 "quarts". I don't think I will do this more then once a year, perhaps every other year.

UPDATE:
I think see my mistake. the rear is straight "80" not a multi-grade. Therefore the 75w-90 would be, at thickest, a "90" therefore slightly heavier then just the 80. Correct?


J
 
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Again ANY synthetic gear lube will provide more then adequate protection, pick your poison!

Koz
 
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