I have an 1994 Volvo 850 and will be changing the oils soon. I just bought this car for $500 buck cuz the other owner could not get it started. Well, I did, it's a great car. Anyway has anybody used Seafoam in there oil prior to oil changes. I want to clean this sucker out good before I do oil, plugs. Etc. any input would be great. It a Non- Turbo.

 

I have to help clear some tapping valves. Its ok to use but I would not drive around on it. Get the engine warm and put it in. Run the engine for a few minutes then let it sit overnight. The next day, start it again and get it to temp. Shut it off and change the oil.

 

I have heard using a quart of tranny fluid also provides similiar results.

 

true but not drive around with tranny fluid in your engine.

 

I did the seafoam thing in the oil ,worked great. I work about 6 miles from my work and I added the seafoam to the oil, drove to work and home a couple days,, then changed the oil. I'd recommend it!

 

I've used tranny fluid before doing a change and I do drive around with it in there. It's basically just a quart of 10 weight oil it just has more detergents in it than motor oil. Seafoam works great and you can drive on it ... dedicated engine flush --> follow the directions on the can !!

 

Ok thanks I will do that. I'm going to just idle it for a bit, then let it rest and change it the next day. I thought I was going to just buy and sell this car, but it runs pretty good as is after I got it running, and for 500 bucks. I'll just keep it for a while.