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Join Date: May 2000
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Which oil brand/type do you use?
Which brand and type of oil do you use in your Alpina? Is this what Alpina originally recommended for your engine, or have you changed because you have found a better brand?
Alpina recommends Castrol Formula RS Syntec 10W-60 for my B10 Bi-Turbo (1990), and this is what I use to top up when necesary. Today, I noticed that after a recent service, my garage had used Esso Ultron 5W-40 (synthetic). From the SAE figures, the Esso oil flows better when cold and does not thin so much as the Castrol at higher temperatures, thus, on the face of it, the Esso oil would seem to be the better choice.
As the Bi-Turbo is a very high performance engine (well, what Alpina isn't), I want to be absolutely sure that I am using the most appropriate type of oil.
I would welcome your own views on this and to hear what you use in your own cars.