What type of octane I should use???

[swng]

Originally Posted by AutoTech1

I would never use a higher octane on a older car... Again, you're just wasting your money... Either get a tune-up (which should target or solve the problem) or get a newer model year car. Engine's wear... Timing changes, rings wear, aluminum parts break down so on and so forth. That knocking is most likely a result of a car that's gone bad after years.

For now, I will not rule out using higer octane fuel in old cars as a short term measure. Maintenance is the ultimate solution if a new purchase is out of the question for one reason or another. Let's hear more comments from our knowledgeable fellow members. I am sure there are very well qualified people among us.