my valver is due its 90.000 mile service soon,
i had magnatec put in it on its last service at 84k, however i am not happy with the oil, the grade in it is 10w 40.
is it still ok to use this grade oil (another make obviously) as the engine has done a fair few miles now,
i spoke to a garage who specialise in renos, and he said hed put in fully sythetic, like it should have ?? and that it would be 5w
apart from the grade to put in please could people tell me the make of it ,and where to get it from,
many thanks !!