I have a 1983 Oldsmobile Cutlass Supreme and need advice on how to preserve the vinyl top...

 

Soap and water cleaning for the most part. Then a vinyl dressing.

Pat

 

I've used 303 protectant in the past. Pay a visit to your local marine supply and ask them to recommend what their customers use on boat vinyl. Thats a pretty harsh environment and if boat owners are happy you will be also.

Welcome to the site, lets see some pictures of your car.

 

Keep it out of the sun as much as possible will prolong the life of the vinyl better than anything, UV is a beast. Car cover or garage kept will help a lot..... Tedd

 

Welcome to the group... Almost everyone has a special vinyl treatment they prefer... Bottom line UV/sun rays beat up vinyl tops... The more sun the vehicle is in, the worse the wear... Nu Vinyl is one of my favorites, but Armor All & Mothers also have good products as well...

 

Welcome to the site. We can't properly give you advice until we see pictures of your car with the vinyl top.

Here's another good thread on this subject:

https://classicoldsmobile.com/forums...vinyl-top.html

I always used Armor All on my 75 Chevy Caprice I had in high school.

 

Welcome to C.O. A small soft bristle brush and Dawn mixed down to 75 % water and 25% Dawn will clean well and not hurt the vinyl or paint.
The 303 protectant is good.Some Protectants tend to dry slowly and will streak down on your windows and paint if it rains soon after they are applied.
Good luck, and we like pictures of the car. Larry