was i wrong folks 2 put in 5-30 fully sinthetic thts wat i as tld by a tuner up my way wen i dne my oil change and only 2 use a genuine toyota filter, another wee thing does anyone kno why an wat could be the cause of using alot ov oil i got a qoute 4 800 quid 2 fix valve stem seals is it common or am i being fleeced