hmm... i am using 0w-30 from BP. Got it from 2005 GT race.... it is light and the performance better. But of coz there is some disadvantage oso lah. The engine is noisier. So far my engine never drinks up my engine oil.
reson being is bcoz my engine overhauled, balanced, ported and polished b4 mah... hehhe.... sorry for not mentioning that. but for aging engine is not advisable to use this engine oil lah... it will damage the engine more than protecting the engine...