200ci STP oil additive

[gvye]

Just wondering what the consensus is out there for STP oil additive. I am about to change the oil on my 66 Ford and used to use this all the time when these cars were our daily drivers in the 70's. Also 10-30W or 10-40W for summer driving?

 

[63 Sprint]

Welcome aboard,
Below is a clip that covers oil additives.

 

[vssman]

I’d add something with zinc in it for the lifters.

 

[63 Sprint]

It is not good to use additives in today’s oils. Putting additives in today’s oils offsets the chemistry balance which could accelerate engine wear. One sign of oil chemistry balance affected by additives is oil foaming. If you want zinc in oil, buy an oil formulated with zinc in it. This was mentioned in the clip in post #2.

Here as another good clip.

 

[vssman]

It is not good to use additives in today’s oils. Putting additives in today’s oils offsets the chemistry balance which could accelerate engine wear. One sign of oil chemistry balance affected by additives is oil foaming. If you want zinc in oil, buy an oil formulated with zinc in it. This was mentioned in the clip in post #2.

Here as another good clip.

I did not know that. Thanks for the information.