SENNA1 Posted January 11, 2012 Posted January 11, 2012 Hi guys, i'm now rebuilding my Manta 2.0S engine(replacing the cylinder head with a 2.2 head). What engine oil is best to use? 20/50 or 15/40? In Cyprus during summer is too hot(around 40C+),but nowadays in winter is around 10C. What do you suggest then? Many thanks. Quote
399Road Posted January 11, 2012 Posted January 11, 2012 Hello Senna1, I used 15/40 in my modified CIH engine. It didn't burn oil or rattle. My Cylinder head had been modified with a tube around the oil's drain in the head. This tube was to keep more oil up in the head around the cam and followers. I think 20/50 might be a bit thick for a freshly rebuilt CIH engine....Luke. Quote
16valves-V-Turbo Posted January 11, 2012 Posted January 11, 2012 In my experience on this subject , the more people you ask the more answers you will get . Usually split decision ! Quote
lamchop77 Posted January 12, 2012 Posted January 12, 2012 Personally i use 20/50, found that the oil pressure dropped with 15/40. Usually use a really cheap 20/50 for running in and then switch to valvoline racing 20/50. Use that because its the only oil that doesnt foam up when revving the motors hard. Alot of stock car drivers i used to know had that problem until they switched. Take a look at the oil gallerys while the engine is apart, they are huge compared to other engines i've pulled apart. HTH Chris Quote
Danny D114BCW Posted January 12, 2012 Posted January 12, 2012 Millers 20/50 racing oil is best stuff going Quote
SENNA1 Posted January 12, 2012 Author Posted January 12, 2012 Thanks to all! But as Chris said,i used to have the same issue with low oil pressure when using the 15/40 oil.I thought that this was due to very hot climate here in Cyprus during summer. Quote
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