i have this can of 104 octane boost that ive had for a long time. at least 3 cars ago (inside joke). now the can does say "unused product keeps indefinitely in can" but im still concerned that it may have turned to varnish, or in some way isnt what it used to be. its probably about 3 years old im guessing. think its safe to use on my car, or should i not bother. i donno if it was necessary to type out the contents, but if you guys would like to be list some of the ingredients, i will do so. thx guys.