Gt4.8BAR Posted May 1 Report Share Posted May 1 (edited) Hi iv always used 10/40 Mobile one oil in my st185 gt4 but thinking of going for Fuchs 10/50 any one use this stuff and worth it? Thanks Edited May 1 by Gt4.8BAR Link to comment Share on other sites More sharing options...
slybunda Posted May 7 Report Share Posted May 7 As thin as possible, as thick as necessary. Going thicker on oil is not always good Link to comment Share on other sites More sharing options...
bazz54 Posted May 9 Report Share Posted May 9 (edited) Well, if you are talking about which brand is best, a friend of mine was a PhD chemist working for an oil company. When asked which oil he used his reply was "Whichever big-name brand is on special offer in the supermarket". If we're taking viscosity, I go with Slybunda. Looking at Toyota Data, generally, over a period of years, they've moved to recommending thinner oils than they used to for a given engine. We still have relatively mild (warm) winters in the UK. It all goes back to the old oil advert which claimed that more engine wear was done starting up and reversing off the drive on a cold morning than in the next 100 miles. Whatever happened to oil adverts? Edited May 9 by bazz54 1 Link to comment Share on other sites More sharing options...
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