Re: The suprising truith about motor oil !

Posted by Chris-se-ILL on September 11, 2003 at 20:10:18 from (216.174.170.194):

In Reply to: The suprising truith about motor oil ! posted by GG on September 10, 2003 at 20:04:46:

just my 2 cents worth.......

I think the testing in this article is faulty! Testing on taxi-cabs is not a legitimate test as pertaining to an average consumers driving habits!

Cold start ups and short trips with some cool-down in between trips keep the engine operating temp below optimum. Also, there are factors that break down the engine oils lubrication factors other than just heat... blow-by gasses with particles of gasoline or fuel entering the crankcase area because of worn rings,, cold start up, excessive acceleration, poor ignition conditions, improperly tuned engine. Idling for long periods can cause some excess contaminates to enter the crankcase.

I have rebuilt many engines and a mechanic can tell when a customer is an avid oil changer! One young man's engine {327ci in a '66 corvette} was disassembled in the shop. The engine had 125K miles on the original engine... and it had rings busted in every cylinder (number 8 cylinder's top ring was busted in 13 pieces) because of his racing tendencies. But he changed his oil every 750 miles! The inside of that engine was "deposit free!" Not one sludge deposit, nor single bit of grime! The block and head castings looked as though the inside was new cast iron. Plus, there was only .010 to .012 wear on the top of any cylinder.

We change the oil in our veicles about every 3000 to 4000 miles. On tractors, it is about every 100 hours!

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