VCCA Home Forums Thread Like Summary - non detergent motor oil

new to antique car , been told by a few people to use only non detergent 30w motor oil, all the non detergent 30w I can find says lubricating oil in fact walmart has a non detergent 30w and it says lubricating oil not for use in motors . what is everyone using I feel better using what has been tested by people who are happy with it . thanks

You will find 98% of the guys here use modern 10W.-30 oil detegent AND ALL. Chevrolet reomended a detergent oil since 1948 when it first became popular. At that time they specified #10 in the wintter and #20 in the summer

There is no such thing as 30W as the W indicates it is intended for winter and #30 is too thick for that..

Listen to what Gene says.

NEVER use non-detergent oil in any engine.

At summer time start-up temperatures a 10W-30 will be a little thinner than the thickness of the straight grade 20W-20 Chevrolet used to recommend.
At winter start up temperatures a 10W-30 will be about the thickness of the straight grade 10W.

In my opinion straight SAE 30 is too thick for cold start-up at ANY ambient temperature.

After 10W-30 was introduced in 1954 Chevrolet reommended it for all Temps. over -10 Deg.