can someone tell me the best type of oil to use in a 1990 g plate astra gte 8v...genuine 54.000 miles...just need to know the best oil 4 it and what viscosity ie 10w/40 etc...im also gonna put new distributor cap and rotor arm on is it best to use genuine gm parts.. cheers lads any help much appreciated
Mk1 Astra, it really depends on what you want to spend but. There are loads of very good oil at that rating. 15w50. There's Mobil1, Motul 300v, Redline etc etc. Motul and Redline you would have to order over the phone or internet (I think ), while Mobil1 15w50 motorsport is sold in halfords. With the mileage of your engine you shouldn't go below a 10w40 rating tho. Again there's loads of very good fully synth oil with that rating.