Excessive oil consumption - high mileage
11-01-2017, 04:42 AM
#21
Oil flow thru the engine is what lubricates it. Flow, not oil on the surface. Going to a heavier grade of oil is unlikely to allow the same flow. Our engines were designed for 30 to 40 grade oil at operating temperatures. Air cooled engines (think motorcycles) and race cars run hotter. Match the oil grade to engine operating temps. Sure heavier grade oil is thicker and the engine may consume less but it may fail at lubrication
Oil is cheap. A quart/liter is what (?) ten bucks. If you add a quart every thousand miles you'll use 50 bottles in the next 50,000 miles. $500 (50x10) is a lot cheaper than tearing the engine down.
Even every 500 miles. Running 5,000 or 6,000 miles a year is more likely and that's just a 5 quart bottle.
Since you're "burning" it just buy by price and in bulk. A heavier grade oil can curb consumption but have unintended consequences.
-- Chuck
Oil is cheap. A quart/liter is what (?) ten bucks. If you add a quart every thousand miles you'll use 50 bottles in the next 50,000 miles. $500 (50x10) is a lot cheaper than tearing the engine down.
Even every 500 miles. Running 5,000 or 6,000 miles a year is more likely and that's just a 5 quart bottle.Since you're "burning" it just buy by price and in bulk. A heavier grade oil can curb consumption but have unintended consequences.
-- Chuck
11-01-2017, 02:45 PM
#22
I went to an engine development conference with work and there was a mention that running a thicker oil can in some cases increase oil consumption as the thicker oil will cling onto the cylinder walls more and then get burnt off.
11-02-2017, 02:09 AM
#23
This is on the nail Robin,,compression and leak down test only check the effectiveness of the compression rings, head gasket and valve seats, there is no way to check how good the oil control rings and valve stem seals except through visual checks, when i stripped Toms engine that had done 120+, apart from the failure i checked all the components against Honda service limits and the only things that were outside tolerance were the oil control rings to the extent that they fell through the bore without any resistance, and Toms engine burned copious amounts of oil but made good power on the dynoMy old engine used about a litre of oil every 400-500 miles. Smoke was VERY visible during VTEC.
Very zingy engine compared to the 05 one I fitted, presumably as it was on half the mileage of the original engine. Final figures to be taken with a pinch of salt!
Can only assume, the amounts of oil it was burning was increasing compression.
11-02-2017, 12:50 PM
#25
This.
My old engine used about a litre of oil every 400-500 miles. Smoke was VERY visible during VTEC.
https://www.youtube.com/watch?v=jePiaZAv-dE&t=48s
Very zingy engine compared to the 05 one I fitted, presumably as it was on half the mileage of the original engine. Final figures to be taken with a pinch of salt!
Can only assume, the amounts of oil it was burning was increasing compression.
My old engine used about a litre of oil every 400-500 miles. Smoke was VERY visible during VTEC.
https://www.youtube.com/watch?v=jePiaZAv-dE&t=48s
Very zingy engine compared to the 05 one I fitted, presumably as it was on half the mileage of the original engine. Final figures to be taken with a pinch of salt!
Can only assume, the amounts of oil it was burning was increasing compression.
11-03-2017, 02:10 AM
#26
11-03-2017, 04:17 AM
#27
Roger that! Dyno can only measure torque at the wheels anyway. Dyno software figures out the horsepower or kilowatts using known formulas are and then some magic, seemingly random number can be thrown in to show flywheel horsepower.
Does anyone know the efficiency ratings of the various dynos? I'm lead to believe the Mustang dynos read as much as 10% lower than some others.
-- Chuck
Does anyone know the efficiency ratings of the various dynos? I'm lead to believe the Mustang dynos read as much as 10% lower than some others.
-- Chuck
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