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TBN is the Go (Total Base Number)
G’day
I use Mobil 1 0W-40 and it works brilliantly (nil oil burn on my engine with approx 33k km ).
I replace oil and filter every year regardless of km travelled etc .
By the way the Higher the TBN (Total Base Number) of an oil the better it holds pollutants/ash etc from the combustion process . It also is more stable and less volatile at high temps ( and in a “hot vee” engine this is a must).
But look all major brands are good but some are much better then others !
Cheers
Bruce
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