Engine oil flush?
05-04-2009, 04:51 PM
#1
Racer
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Engine oil flush?
I have an '84 euro 928s and wondering if I should do an engine flush. I have no history of when the oil was changed and the pressure is mostly plus 5 bar, off the little scale. It gets down to 4 bar when its hot and I have my foot off the pedal. Temperature meter is fine though.
Anyway, I read something about using forte motor flush or ATF and something on engines with or without a sump.
Oh, and to make it even more complex, some people warn about sludge coming lose and clocking up the engine in other parts when you flush.
It's all so complicated!!! Help please
Anyway, I read something about using forte motor flush or ATF and something on engines with or without a sump.
Oh, and to make it even more complex, some people warn about sludge coming lose and clocking up the engine in other parts when you flush.
It's all so complicated!!! Help please
05-04-2009, 04:55 PM
#2
Race Car
In instances like these I would say if it's not broken, don't try to fix it. I have heard of people using ATF to clean out an engine, but there's no definitive length of time to run it for. If you run it too long, you could mess something up and end up with a toasted engine. When you say it's 4 bar when hot, how hot? And what brand/weight of oil are you using?
Dan
'91 928GT S/C
475hp/460lb.ft
Dan
'91 928GT S/C
475hp/460lb.ft
Last edited by dprantl; 05-04-2009 at 05:30 PM.
05-04-2009, 05:23 PM
#4
Team Owner
Thanks Wally, thats what i would have said...........
In the older days like pre 70s when oils were not as well made and the service intervals were not usually followed , it would have been possible to gum up the engine depending on the oil brand used, Pennsoil comes to mind (pariffin based).
This could lead to clogged or reducxed oil returns and other not so good things, adding some kerosene and running the engine for about 10 mins would usually flush out the engine, as well as break down a lot of the deposits.
With your 928 engine is is better made and has had better lubricants in it so deposits wont really accumulate like an old V8 engine might.
If its not broken dont fix it.
Regular oil changes with good dino oils will usually remove most deposits but this also requires frequent driving and frequent changes.
In the older days like pre 70s when oils were not as well made and the service intervals were not usually followed , it would have been possible to gum up the engine depending on the oil brand used, Pennsoil comes to mind (pariffin based).
This could lead to clogged or reducxed oil returns and other not so good things, adding some kerosene and running the engine for about 10 mins would usually flush out the engine, as well as break down a lot of the deposits.
With your 928 engine is is better made and has had better lubricants in it so deposits wont really accumulate like an old V8 engine might.
If its not broken dont fix it.
Regular oil changes with good dino oils will usually remove most deposits but this also requires frequent driving and frequent changes.
05-04-2009, 06:17 PM
#5
Racer
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Yeah, I keep hearing that with old cars. If it's not broke, don't fix it. I guess I'll just leave it then and only change the oil. Thanks for the advice!
