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Routine Oil Changes

Johnapool

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wasn't there a report saying one reason for the short change interval was the motor and transmission sharing the same oil as is commonly found with motorcycles .... I tried to find that thread but wasn't able to do so

Jim
I know most motorcycles use wet clucthes and the engine and transmission do share the same oil. I don't know much, but I do not know of any "regular" automobile that does not use a dry clutch with the ordinary features of flywheel, pressure plate, clutch disc and throw-out bearing for a standard manual transmission, which means engine and tranny have separate oil compartments.
I kinda think I would not want tranny oil circulating through my automotive engine.....
 

JP

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7.3L Powerstroke ('96) diesel. Which, amazingly, gets around 18mpg. Not too bad for a Supercab 4x4 w/8' bed (like trying to park a school bus when I was having to drive it to work). Coming up on 300k on the odo., and purrs like a kitten:rolleyes:...Okay, maybe not a kitten because it's loud as hell when it's cold. But it does run good.

Someday I'd like to build an 87-91 F250 or 350 with a 12 valve Cummins and a 5 speed
 

wheaters

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The British Leyland Mini had the engine and gearbox in the same casing. However, the clutch is still a dry one, bolted on the outside. The Elio/IAV engine is a redesign of the Suzuki G10A/Geo unit, which has a conventional transmission bolted on the end of the crankshaft. There's no chance of it sharing the same oil!
 

Smitty901

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I know most motorcycles use wet clucthes and the engine and transmission do share the same oil. I don't know much, but I do not know of any "regular" automobile that does not use a dry clutch with the ordinary features of flywheel, pressure plate, clutch disc and throw-out bearing for a standard manual transmission, which means engine and tranny have separate oil compartments.
I kinda think I would not want tranny oil circulating through my automotive engine.....

They have that a bit wrong. many motorcycle share a lube with the primary and transmission . The engine is still separate. Now some do it but not that many
Example Sporster Engine has it's own oil, Primary and Trans share
All other Vtwin HD Engine,primary and trans all separate
 

Joshua Caldwell

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I have one of the situations where it is cost effective to go to Jiffy Lube due to the free topups between official oil changes :) I abuse the policy, they know it and have commented on it, but I've told them that there's no reason for me to pay for expensive engine repairs when they'll just replace the oil for free, and because it's the policy without anything they have been able to use to wiggle out of it, they have kept doing it for years.
 

Johnapool

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I perform oil changes every 2000 miles by virtue of my engine burning it until I get a low oil warning and putting in a couple extra quarts.
Reminds me of a 1959 Renault Dauphine I once had, briefly. Kept a gallon of recycled motor oil behind the seat......didn't have many mosquito problems...
 
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