Re: O.T. 15W40

Posted by T_Bone on June 07, 2004 at 22:41:55 from (4.240.42.19):

In Reply to: O.T. 15W40 posted by rustyfarmall on June 07, 2004 at 19:21:47:

Hi rustyfarmall,

I agree about the oil clearance with a heavier weight oil. Along with that you will probably drop what little fuel mileage you get.

I stumbled onto another problem. I was a long time user, 40yrs, of Quakerstate oil. I bought a new Chevy 4cyl gasser and did the first two oil changes with Quakerstate 10w30 but notice my oil was extreamly black comparred to the factory oil at the same mileage change.

In the mean time I had been looking for a oil to use in my new F350 PSD and decided on Chevron Delo. no change in fuel mileage vs the factory oil.

So I thought I'd try Chevron Supreme 10w30 in my 4cyl. I picked up 2mpg the first tank. The first oil change went longer before the oil turned black and by the 2nd oil change, the oil was back to looking dark amber just like the factory oil but I now got another fuel mileage increase of 4mpg total vs using Quakerstate. No other changes were made.

Telling my son about my findings, so he trys CS 10w30 in his Ranger and got 2mpg increase the 2nd tank full.

T_Bone

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