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I`m planning on doing my first oil change in my 51 Buick and have some uncertainty as to which oil weight to use and if an additive is necessary? The reference book suggests using 10w, l was planning on using 10w40 since the book claims to use heavy weight oil.Living in Western,NY have my concerns about using that particular weight oil year round. I`ve read that some members suggest using a zinc additive in there oil,is it neccesary?
Thanks for any and all replys,Toolman53
I run 10-40 in my 263 and have put over 100.000 miles on it. I am in Michigan , so our weather is similar. If your engine is original, I do not think you need the extra zinc. The older engines did not have the heavy pressures from valve springs that the high performance engines do.
THEOLDGUY
Thanks for the information,are weather is very simular and if the 10w40 works for you I`ll be content using it also. Do you change your filter with every oil change? I`m not planning on driving it in the winter,but if the roads are salt free I wouldn`t mind to take her out.
This old car is new to me, and I enjoy working on he
Thanks, Bob P
The filters are "partial" flow filters and I change mine every third oil change
Thanks for the 411, I wouldn`t have known that.
Toolman53
A good candidate is Delo 400 or Shell Rotella