Originally posted by Illswyn
Misinformation.
You break in a car on dino. After the break-in period, you can use synthetic. You can switch back and forth all you like, mix them if you want. They're completely compatible. Saying they're not is 30 yr old advice, because that's about when synthetics were made to be compatible with dino oil. So, unless you're pouring 30 year old synthetic into your car, or you have 30 year old synthetic in your car, that information is just plain FALSE.
Synthetics don't leave sludge, dino does. Dino oil breaks down, smaller molecules boil off, larger molecules bind together forming sludge. Synthetics are uniform in size molecules, meaning they resist burning off.
Please...read something about synthetics before posting.
I switched to synthetic in my MX-6. It ran just the same as with dino. I popped a coolant line one too many times leading to a bad head gasket, but no oil problems. No excessive leaking either.
I switched my Tempo to synthetic as well. Ran it about 20,000 miles, with one filter, which is still on the car 5,000 miles later. I now have dino in the Tempo, because I knew the oil needed changed, and really didn't feel like putting out the money on the Tempo anymore. If I thought I'd get reliable miles out of it, I might have, but miles rack up quick on 60+ miles/day driving.
hoe i said all this ! go re-read what i wrote ! misinformation my ass.