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There are probably a few factors involved with the higher oil capacity of newer engines that have a similar engine displacement relative to older engines as well as the smaller turbo pickup engines with a higher capacity for their engine cubic inch size. More oil giving a longer engine run time before the oil is contaminated and sheared down etc. More cooling available with more volume. More oil consumption cushion before bad things happen. The horsepower newer engines put out would certainly play into the higher volume of oil that helps control the temperatures as after all engines of a similar size putting out twice the horse power means more fuel used and more heat created requiring a better coolant package with coolant and oil with oil cooler etc. To show the engineered difference for example in oil volume for the very same engine series/block/cubic inch displacement on a JD four wheel drive tractor I have that is rated at 425 hp it has an oil capacity/pan sized for 44 quarts, the largest series of tractor of that time was rated for 530 hp and had a pan capacity of 63.5 quarts. -
Only when its convenient for GM. Its called ass covering. the 6.6 that consumes. -
By asilverblazer · Posted
It would be coincidental for both front brake hoses or calipers to fail at the same time. There is an old thread on here of similar a similar issue, not sure how best to direct you to it - but I would be looking at the brake booster. -
By asilverblazer · Posted
It could be consumption too, GM allows (acknowledges, expects?) some loss. -
By asilverblazer · Posted
That's a bunch more variables, Grumpy might be able to calculate it, I'm not going to. 😄 Thanks for sharing, number 6 seems risky given the owner's manual statements:
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