I'm the second owner of a 1954 Buick that I bought in 1975 and I plan to keep it until the day I die. It was originally bought by my aunt and now has 36,000 miles.
I have a '54 and a '55 Buick that both have the original unrestored engines. I am now using 10W-30 Valvoline conventional motor oil. I am wondering if a synthetic or a synthetic blend oil would be a better oil for these engines?
The engines have low miles and run excellent with no oil burning.
I have some STP brand oil filters that a frend of mine gave me 20 years ago when he sold his Jiffy Lube shop. I have been using them and I want to know if they're still OK to use?