I can get 5 gallon barrels of either rotella or Mobil delvac at Canadian tire on sale for very cheap. Only thing is they only seen to have 15w40 in stock and I was hoping to go with straight 30 weight. Although I should try one change worth before assuming it will work fine and buying that much.
Originally Posted by Mad_Max_Sam
my only point was that Shell did not recommend their 5W30 gas-truck oil for flat-tappet cams...when they could have just said 'yup they're all good' - I thought that was fairly forthright of them. I do have a fair amount of faith in the Rotella T4, 5, 6 oils now, plus it isn't spendy and it's easy to find just about anywhere. ...or I suppose I could also just get a case of Joe Gibbs HR-5 10W40 and call it good...
Originally Posted by caprice_2nv
So that's words straight from Shell basically saying they think zddp is important for flat tappet. Unless they are just saying it because they're aware that the majority of old car enthusiasts are under the impression that it is important? It may be easier for them to state which oil has higher zddp than to argue whether or not it is important.