I use Gulf formula G 5w40 fully synth.

Well for the last two oilchanges, before that I used castrol edge 0w40 because it was the only fully synth stuff I could get at the time.

Might try that eneos oil if I can get hold of it.

I always change the filter with the oil, is it ok to leave the same filter on?

What oilfilters do you guys use? I use the oem toyota one, but not sure if its any good as its made in china now.
