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I've got a Beetle with a turbo. Is that thing doing nasty destruction to my oil? Maybe I should cut intervals in half (to 5000).

The engine says 5w-20 but it's also very old (200,000 miles). Think it would be alright to use Delvac 1? I've had extremely good results with it (two cars went almost 400,000 miles).

It's a two-stroke glowplug engine that uses a 1 part oil, 4 part glowfuel mixture (i.e. 20% oil; 80% fuel). No piston ring (it's aluminum inside a nickle-plated sleeve). http://www.osengines.com/engines/la.html

What benefits does a natural oil provide that synthetic cannot?

iF YOU'RE CURIOUS ABOUT THE FACTORY FILL take a look at this. This is a copy-n-paste from a different forum. QUOTE: "I recently changed my oil for the first time on my new Insight and sent a sample of the original oil to Blackstone Laboratories for analysis. Here is the information from there...

Does it exist? I didn't see any at the walmart. Maybe I'll go with the Quaker State synthetic instead (it has the green dexos symbol on it).

I've been running XL-7500 oil. Did I hear correctly that Amsoil renamed it OE (original equipment)?

Is is true that 5w-20 synthoil has no viscoity modifiers in it? Perhaps that explains why Amsoil's Signature 5W-20 is cheaper than 0W-20? Fewer additives?

I found this on another forum. Thought it might be useful. It lists all the Mobil 1 oils: 0w-20 2.60??? (made for toyota) 0w-20 2.70 (fuel economy oil) 5w-20 2.75 5w-20 2.75 (15,000 mile oil) 0w-30 3.00 (fuel economy oil) 5w-30 3.10 5w-30 3.00 (15,000 mile oil) 5w-30 3.30 (high mileage...

I decided to try an experiment and run my car (1987 Plymouth Caravelle) for 20,000 miles on the same oil. Of course I used the best oil I could find: Mobil Delvac 1 (synthetic/5W-40/diesel oil). I then got an oil analysis to see what kind of results I got, and I think it looks good: 4 quarts +...

My brother's gasoline-powered truck blewup at 100,000 miles. He was towing a camper and driving from PA to North Dakota, doing about 65 he said, when the engine made a loud bang and died. He then spent $5000 buying a new engine. I keep asking him if he did anything "wrong" and he says not...

All the synthetic brands say it's okay to top-off with conventional/natural oil. For example using Mobil 1 as your fill and a few thousand miles later topping-off with Pennzoil conventional. No prob. But they do not recommend topping-off with synthetics. For example, using Mobil 1 and later...

1987 Plymouth Caravelle 1997 Dodge (Mitsubishi engine) Avenger 5W-20 Amsoil Base 4 synthetic Currently using: Mobil Delvac 1 The manual says 5W-30 but I was wondering, since Amsoil is a strong synthetic oil, if I could use the 5W-20 in these older cars? (According to the specs, it's right on...

If I let my car sit for 3 or 4 months, is the oil going to turn to sludge? Will the seals rot? My parents keep saying, "You'll kill your car," but I think that's ridiculous. It's in a garage. It's protected from the elements. Your thoughts?