This post is basically about Oil in general. For those of you who are fussy about it, and particularly those who have had pre oil-change tappet/cam followers/hydrolic lifter noises that have gone after an oil change.
There are many branded oils that every man and his dog has heard of, eg. Mobil 1, Castrol GTX, Esso, Duxhams QXR, Rock Oil Strata, Repsol, Petrofina etc all made by their own manufacturer. When it comes to oil though am I not the only a little doubtful about vauxhall oil ? Who is it made by ? Well I very much doubt it's GM, and dont you wonder why it is so cheap ? Maybe I'm paranoid but I like to know who makes what I have in my engine like most enthusiasts.
Also, getting to my actual problem I want the advise of a bloke in the know. I have noisey tappets which I have have had in many cars, all of which have been irradicated by a decent semi-synthetic but all my previous cars have been 8valvers. Now I own a 2.0 16valve Ecotec the noise is not curing as easily. My common sense tells me to put say a 5.30 in, instead of a 10.40 as it is thinner and will get around quicker on start up. However, I have seen many posts that say a thicker oil should be put in. Which would you recommend as the sound of metal on metal makes me cringe.
Thanks for reading this, sorry it was so long, just wanted to explain in full. Chris.