Oil Level vs. Negative Rake
#1
Oil Level vs. Negative Rake
OIl level is supposed to be checked on level ground but have you ever noticed that our vehicles have a negative rake? This causes the engine to be somehat lower in front than the rear. I'm wondering if the engineers took that in mind when they calibrated the dipstick. Could that be the reason that they specify 4.5 qts trather than 5?
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Daftlad (09-10-2022)
#2
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For me 5 quarts in puts the level to the top of the dipstick good zone, maybe a smidge higher. I like to check it at known flat ground, usually a big gas station like a truck stop. The 4.5 vs 5 quart thing is both puzzling and somewhat annoying. Most cars seem to take 5 quarts. Willing to bet most of us buy oil in the 5-quart jug. That leaves you half a quart reserve, which you can either leave in the big jug in the garage, throw it into the crank case anyway (not really a good idea), or in my case transfer it into a quart bottle for a roadie top-up. My car doesn't seem to use much oil between changes (3K) maybe a half quart for a lot of city driving, usually nothing for mostly highway miles. So sometimes that bottle goes unused and I end up with a full quart extra after two oil changes.
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#6
Obviously, your owner's manual reads differently than mine and the Bentley Service Manual. Not that it's the definitive source, but a GOOGLE search will also show 4.5 qts. The cooler to which you refer is actually a heat exchanger in concert with the oil filter. No additional oil is required.
#7
Hmm. Odd. I've always used about 4.8 quarts. It's also what is specified in the factory (or so I thought) docs that I have. I always ignored the 4.5 spec'd in my Bentley because I figured the factory knew what it was doing, and I never showed as overfull.
I'm mostly curious about the discrepancy. I'm unaware of any change during the model run that would alter capacity.
Oil coolers are by definition heat exchangers, aren't they, regardless of what fluid the heat is moved to?
I'm mostly curious about the discrepancy. I'm unaware of any change during the model run that would alter capacity.
Oil coolers are by definition heat exchangers, aren't they, regardless of what fluid the heat is moved to?
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#12
I stumbled on a GP1 press release document dated June 2006 yesterday and saved that for future reference (pdf with related press image moved to new topic here). Very interesting stuff contained within, however this partial specifications page screenshot from that likewise stated 4.8L/5.07qts which seems definitive.
Last edited by MCS4FUN; 09-18-2022 at 01:18 PM. Reason: Moved pdf doc & image to new topic in 1st Gen GP subforum
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NC TRACKRAT (10-03-2022)
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