Interesting data on current motor oils-let's talk it out
12-12-2006, 11:58 PM
#17
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never trust a Brit!
Ed I knew it would upen up a can of worms - however very interesting stuff.
Can't wait to hear Doug's comments as in my eyes he is the guru on this subject.
Ed I knew it would upen up a can of worms - however very interesting stuff.
Can't wait to hear Doug's comments as in my eyes he is the guru on this subject.
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
12-13-2006, 12:06 AM
#18
Nordschleife Master
Oil threads are always so ... oil threads.
Oil does the heat transfer from the really high temperature areas of the engine, valves and cylinder walls, but doesn't need to travel far inside the motor to come back to the same range as the water jacket, so unless the temp gets measured closer to the heat sources I don't think it has much value.
Its possible to be a very good mechanic without any real engineering skill, but when VW designs a motor its a pretty sure bet that somebody that is an engineer knows exactly what and why of all the cooling and lubrication systems. A knowledgeable person should be able to calculate both the lubrication and heat transfer requirements of an engine and design it to run reliably with any type of oil they want.
Modern lubricants allow very tight tolerances, and a side effect of that can be reduced oil flow through the bearing.
I use mobil 1 in the engine because I am too cheap to use Redline, but Redline goes everyplace else.
Oil does the heat transfer from the really high temperature areas of the engine, valves and cylinder walls, but doesn't need to travel far inside the motor to come back to the same range as the water jacket, so unless the temp gets measured closer to the heat sources I don't think it has much value.
Its possible to be a very good mechanic without any real engineering skill, but when VW designs a motor its a pretty sure bet that somebody that is an engineer knows exactly what and why of all the cooling and lubrication systems. A knowledgeable person should be able to calculate both the lubrication and heat transfer requirements of an engine and design it to run reliably with any type of oil they want.
Modern lubricants allow very tight tolerances, and a side effect of that can be reduced oil flow through the bearing.
I use mobil 1 in the engine because I am too cheap to use Redline, but Redline goes everyplace else.
12-13-2006, 12:27 AM
#19
Rennlist Member
Interesting read although the era of the cars and motorcycles discussed in the attachment are relative ancient technology; not sure how they relate to the 928 engines.
Ever seen the square tappets they reference in Brit m/cycles that were originally designed in the 1920's...............I still wear scars on my hands from rebuilding those old Nortons; Duckhams 20w50 was the oil back then, sounds like it still is.
Ever seen the square tappets they reference in Brit m/cycles that were originally designed in the 1920's...............I still wear scars on my hands from rebuilding those old Nortons; Duckhams 20w50 was the oil back then, sounds like it still is.
12-15-2006, 04:44 AM
#20
Rennlist Member
Originally Posted by worf928
.... (I still have cases of old ZDDP-laden 20w-50 dino juice for CarChick's 16V Scirocco, assuming I get the thing running again...) ...
Just a data point ... I have some 20-30 (?) year old Quaker State 20-50. If you pour all the oil out of a container there's a thick layer of waxy sludge stuff left behind on the bottom. One of these days I mean to send a jug back to Quaker as a gift.
12-15-2006, 06:21 AM
#21
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Will
like old fashioned paint in tins, oil should be stored upside down so that the solids remain at the top. Don't blame your quaker state oil (Pennzoil ?) Sit a can of Mobil 1 synth and don't move it for a year and see what happens.
like old fashioned paint in tins, oil should be stored upside down so that the solids remain at the top. Don't blame your quaker state oil (Pennzoil ?) Sit a can of Mobil 1 synth and don't move it for a year and see what happens.