Hi,I wrote recently asking about what Oil to use in my 1997 1.8t 92,000mls..thanks to those guys who replied before..but I have no more idea now that I had last week..The car has been using Castrol Magnatec 10/40 which is supposed to be a Semi Synthetic..lot's and lot's of opinions have been made regarding this subject on every Forum you go on and I know everyone has their idea of what they might think is best..for example I was told that putting a Fully Synthetic Oil in an older engine that had done close to 100,000 miles was not a good idea..I was thinking of of Mobil 1 but then do you use 0/40 or 10/40..probably the guy has got a point with an older engine that has never ran on fully Synthetic..the whole Oil Saga is confusing to say the least..and while we are on the subject Oil Filters that too is another thing about this car have Audi modified the later Filters because the originals were in adequate or is that wrong info..I would be gratefull for some usefull comments on what Oil and Filter you Guy's use..also I don't and am not interested in Racing around a Track to see how fast the Car with me in it can go so using Oil for that option is not needed...real thanks to all in advance I welcome your thoughts...