Lighter weight oils
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Elder User
Joined: Sep 2000
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From: Bay area
Lighter weight oils
I was reading a thread a while back where they were saying you could use 80wt90 in place of 90wt-140. something to do with the newer lubicants.
in doing this would anyone see a difference better fuel millage or is it not worth the money to change the fluids.
in doing this would anyone see a difference better fuel millage or is it not worth the money to change the fluids.
Postmaster
Joined: Mar 2001
Posts: 4,968
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From: So Cal
Lighter weight oils
Depending on temperatures and the requirements of your tranny, you possibly could use the lighter oil. Best bet is to follow mfg specs. You might save some gas but I would guess the results would be hard to pin down. After all, your mileage probably varies by 1 or 2 mpg every tankful. How can you tell if you saved 1/2 to 1mpg by changing oil?
If you use a synthetic I think most applications would be safe.
The heavier oils work better for hot climates but syn doesn't care. I once got stuck in near zero temps with 140W in the gear box of a rice burner and man that tranny was hard to shift until it warmed up. the stick moved like it was plowing thru fudge. The lighter weight oil will work better in normal and low temps. Once again syn doesn't care.
Good Luck.
Jim Henderson
If you use a synthetic I think most applications would be safe.
The heavier oils work better for hot climates but syn doesn't care. I once got stuck in near zero temps with 140W in the gear box of a rice burner and man that tranny was hard to shift until it warmed up. the stick moved like it was plowing thru fudge. The lighter weight oil will work better in normal and low temps. Once again syn doesn't care.
Good Luck.
Jim Henderson
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Elder User
Joined: Sep 2000
Posts: 936
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From: Bay area
Lighter weight oils
then your saying since I am in the bay are, cali the heavier weights would be better for me. I do alot of heavy off roading and crawling.
I was just looking for somethign to extend my on road millage a tad bit!
I was just looking for somethign to extend my on road millage a tad bit!
