I hav noticed that one of the SU carbs on my 1970 240Z is low on the oil that goes in the top. Every book I have read says you MUST put SAE 20 oil in there. I can't find that at any local auto store.

Is there an alternative or where would I find SAE20 oil?

I also cant tell exactly where the fill line is. What is the proper level in the carb?

Thanks........

Well, you could order it from MSA. I also found 20 weight oil at Ace Hardware. I think it was sold under the 3 in 1 brand.

I found some at the local parts store, apparently new Hondas are using it. 0w-20. It was kinda expensive because it's synthetic. I went back to 30wt since it's getting cold, my acceleration seems a little better now.

0w-20 is a multiweight oil. It would not necessarily act like 20 weight oil all of the time. I'm not sure how a thicker oil would help you when it gets colder. It sounds counter-intuitive to me.

Should be able to get straight 20 weight at a motorcycle shop - most brands of fork oil are available in that weight.

A good quality of ATF is recommended by "ZTherapy". It just happened to be what I had been using for some time. It is great, but a bit thinner so check it every so often.

Hope that helps-

72 240

Sorry but what is ATF?

Automatic Transmission Fluid

Sorry but what is ATF?

Spoken like a true lover of driving......ATF what? .

I'd previously been recommended (and used) sewing machine oil. I'm now using a machine oil - engine oil mixture and it's eleventy billion time better. Nice sharp throttle response. Now...I just can't remember the damn ratio!

Most Automatic Transmission Fluid is 20wt oil. And several people use it in the carbs. I do and have no problems. The fill line is on the shaft. Don't worry if you over fill. It will get sucked into the engine and burn off.

Ed, I think you can safely say most people.

I currently use ATF too. It just happened to be in the garage when I noticed my carbs were low. The carbs work great.

I have also used 10W40 10W30. I can't tell much difference.

You could probably use vegetable oil (Im not going to try it). The oil doesnt really oil anything. Its just a liquid damper.