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July 23, 2005
G'day Jim
Joe's correct when he says :"A good many new cars come with Mobil 1 as the original factory fill"
However, these cars were/are designed for light weight synthetic oils. For example, often you will find overhead camshafts running directly in aluminium cylinder heads, with no intervening bearing material.
Your car was designed with larger tolerances, and required a heavier grade oil. Rebuilding it doesn't change that.
We use a standard mineral based oil (Penrite HPR30 which is 20W60 weight) in both road and race engines, and never have a problem with it.
About 12 months ago we rebuilt an MGB engine for a customer. He and his father fitted the engine at home, and decided to use a "friction modified" synthetic oil from new. He phoned me the next week to say the engine was blowing lots of smoke, and that's when I asked him what oil he had used. I had him change the oil and filter, and stick in Penrite. The smoking has reduced, but I fear it is going to take many miles before the rings bed in, now that both they and the cylinder walls have a nice Teflon coating.
avagoodday
Colin
"Colin Dodds" < colin@... > 37957
Posted on July 23, 2005 08:00 AM
Posted to category(s) Engine (external) | Engine (internal) | Exterior | Gauges | Intake System | Lubrication System | Miscellaneous | Racing | Restoration | Technical Info | Transmission
