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#130424 - 05/01/05 04:11 AM
Re: I am tired of everybody saying 20 wt oils exist only for gas mileage
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Registered: 06/02/03
Posts: 23591
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quote:
Well, would 75 in a minivan climbing the mountains of central PA on I-80 qualify??
Absolutely! ![[Smile]](images/icons/smile.gif)
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#130425 - 05/01/05 05:44 AM
Re: I am tired of everybody saying 20 wt oils exist only for gas mileage
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Registered: 12/06/03
Posts: 7409
Loc: Austin, TX
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quote:
Originally posted by 427Z06:
When testing a non-friction modified 15w40 HDEO and a friction modified dino 5w20 in particular engines, my experience has been that when they have non-friction modified 15w40 HDEO in them, they reached operating temperature is less time. My guess is, they were burning more fuel to maintain the same idle and moderate acceleration levels, thus the engines were generating more heat.
I just like to add to this, that once up to temperature, the friction modified dino 5w20 stabalized at a lower temperature than the non-friction modified 15w40 HDEO under moderate driving conditions.
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#130426 - 05/01/05 01:06 PM
Re: I am tired of everybody saying 20 wt oils exist only for gas mileage
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Registered: 08/11/04
Posts: 2387
Loc: Chicago area
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Dr.A - Just because the pressure is the same doesn't necessarily mean that one oil is thinner/thicker/the same, than the other. The pressure gauge reads from the pump and relief valve operation, and the oil may be thinner at the cams, rings, bearings, where heat and pressure have great effect.
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