cupas Posted July 16, 2013 Share Posted July 16, 2013 What motor oil is recommended for opel manta b gsi 20e engine (over 200k km)? semi sintetic or ful sintetic and 5w40 or etc? Quote Link to comment Share on other sites More sharing options...
pat Posted July 16, 2013 Share Posted July 16, 2013 20w/50 every time in my book if it uses no oil at all you could go for a 15w/50 good quality plain mineral oil and frequent oil changes , i personally would not bother with a synthetic as long as it gets a frequent oil change Quote Link to comment Share on other sites More sharing options...
1900SR Posted July 17, 2013 Share Posted July 17, 2013 I'd agree with Pat, the CIH was designed for mineral oil with I think 6000 mile oil changes on the GT/E. Quote Link to comment Share on other sites More sharing options...
cupas Posted July 17, 2013 Author Share Posted July 17, 2013 I used semi sintetic 10w40 last time... car went on it max 3000km. If you are sure that mineral oil is best choice I will change sintetics to mineral Quote Link to comment Share on other sites More sharing options...
Rapierdave Posted July 17, 2013 Share Posted July 17, 2013 Yes agree with above use a good quality 20/50 Quote Link to comment Share on other sites More sharing options...
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