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hitman3
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what oil to use in my 928
hi guys can any one tell me what is the recommended oil i need to use in my 928 4.7l 1978 16 valve Porsche some say the best engine oil is 10w-40w semi synthetic and some say full synthetic pls hlp is any one have the engine top diagram of 1978
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07-19-2009, 01:20 PM
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Banned
Join Date: Mar 2007
Location: Ft.Lauderdale, FLORIDA
Posts: 2,813
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I use 10w-40 Castrol GTX in south Florida, year round.
Brand? Literally, whichever label has your favorite color is the one to use. I use Castrol simply because I've used it for years, it was recommended to me by a VW mechanic when I bought my first car in 1984. I doubt it has any advantage over any other name brand oil. Synthetic versus non-synthetic? You decide. Plain and simple, synthetic oil is better. But I once had a student [I was teaching him to fly airplanes] who was a chemical-petroleum engineer from South Korea. He told me that unless I was driving a car with an air-cooled turbocharger or racing my car competitively....that synthetic oil was a waste of money, since my car would never need its increased capabilities. -He also told me to pick one oil and stick with it. Changing brands is not a good idea, as the different detergent package could cause large amounts of deposits to suddenly become suspended, clogging your oil filter and possibly some of the oil passages. And DO NOT switch between synthetic and non-synthetic oil! Moving either way, from one to the other can cause all sorts of crud to become suspended and may even cause oil leaks. I suspect that any name brand will work for you. Israel can be VERY hot- you might consider 20W-50. If you do, heed my advice and on cold days [15 C or less], keep it below 3000 rpm until your temperature gauge is where it normally rests. Otherwise, your oil pressure will go sky-high and you run the risk of blowing gaskets/developing oil leaks. Good luck- N Last edited by Normy; 07-19-2009 at 02:41 PM.. |
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07-19-2009, 02:35 PM
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Network Native
Join Date: Jan 2007
Location: SoCal
Posts: 10,349
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Look for a SJ rated oil, I use Rotella T non synthetic.
Stay away from the newest generation of very low zinc oils made to help newer cats from clogging, which are I think SM rated, |
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07-19-2009, 02:44 PM
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Registered
Join Date: Dec 2007
Location: Vancouver, b.c.
Posts: 71
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Every motor oil uses zinc compound as an extreme pressure additive.
The numbers for Shell Rotela is 0.13% zinc, Mobil 1synthetic has 0.10% Zinc. For the money Shell Rotela is an excellent choice for the 928 |
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07-19-2009, 05:39 PM
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Banned
Join Date: Mar 2007
Location: Ft.Lauderdale, FLORIDA
Posts: 2,813
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Quote:
Me? I'll continue to put Castrol in it. I suspect that 10 years from now, I'll still own the same car with the same bearings and the same brand of oil in the sump- N! Last edited by Normy; 07-19-2009 at 06:26 PM.. |
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07-19-2009, 06:22 PM
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928: Serial Enabler
Join Date: Sep 2007
Location: Elkhart, Indiana
Posts: 2,929
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Just switched to Mobil 1 15W 50.
Has all necessary nutrients. Look for diagrams here: http://www.cannell.co.uk/Manuals.htm
__________________
84,85,86 928 cars Last edited by Landseer; 07-20-2009 at 02:36 AM.. |
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07-20-2009, 02:33 AM
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hitman3
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thank u all for good help
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07-20-2009, 09:59 AM
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Registered
Join Date: Feb 2009
Posts: 15
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+1 on the Shell Rotella, but has anyone had any experience with Chevron Delo 15w-40? My local Costco has it for about $10 a gallon, and it seems to be on par with the Shell product. Zinc rating is approx. 14-15%.
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07-21-2009, 08:37 AM
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my porsche
