Oil Weight

[Red69]

Just wondering if my 1969 2000 could use synthetic oil? It is not a daily driver and I change oil every 4 months. I start it and let it run a bit weekly.

Proud to have been awarded best import at the West Georgia AACA show this spring.

[SLOroadster]

I've run synthetic in mine for nearly 20 years. 15-50, 20-50, and more recently, 10-60. It works great.

Will

[notoptoy]

Welcome! Lots of debate over this topic. My answer is, "it depends". Is it an original engine? Has it been completely rebuilt, modified, major component change etc.? The biggest question/concern seems to come down to the amount of Zinc or ZDDP concentrations are available. Flat tappet, older cams were built in a time where these levels were higher than current oils. There are Synthetic and other modern oils that meet this requirement. That said, I have rebuilt the engine in my H20, and used synthetic oil since right after I used the break in oil (Brad Penn, Dino Oil) with no ill effects. YMMV and I think you'll find that no three people will agree on any one approach

[Gregs672000]

I'm going Valvoline VR1, 10/30. Used to run 20/50 and 15/45, but after reading all the oil posts here decided to go 10/30 and it has not been a problem.

[nismou20]

Will, What are your reasons for such hi viscosity oil? 10/60

[Toptech360]

I like synthetic also. If the engine is healthy and doesn't have excessive leaks synthetic works well. Currently running 5w50. Do a search here and you will find good recommendations.

Since you start the vehicle weekly I would suggest a 5w-XX or 10w-XX oil, cold starts are arguably where most wear occurs, you want an oil that flows well at ambient temp. (Remember that in the world of oil, cold can also be a 90 degree day) I could keep going on this subject, but as mentioned before no 3 people have the same opinion and a lot of oil talk is unfortunately based on opinion and myths.