03-11-2003, 02:18 PM
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Senior Member
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Join Date: Sep 2002
Location: So. Calif.
Posts: 323
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Quote:
Originally posted by gsxr
Your dealer is an idiot. I can't believe all the fairy tales out there. Synthetic is about the best thing you can do for your engine, believe me. And Delvac-1 is about the best diesel synthetic oil on the market today. There is NO problem switching at high mileage. I switched all three of mine at time of purchase, at 190k, 228k, and 202k respectively and have seen nothing but fantastic results.
It will not provide a large increase in MPG, but should give you maybe 0.5-1.0mpg better after a few thousand miles. It also helps with cold starts (particularly in sub-freezing weather), can quiet noisy lifters in your 603 engine, lowers oil temps, and will clean out the sludge & deposits from years of using dino oil. You can extend the drain intervals as well, to at least 7500-10,000 miles unless you do all city driving. It can reduce oil consumption as it frees the rings up, if they were sticky to begin with. It can take 5k-10k miles on the synthetic to see the full benefits, although some notice a difference in a few hundred miles. YMMV, of course.
Synthetic won't cause leaks, won't ruin your engine, won't make your wife leave you, or your computer crash. Don't believe everything you read on the Internet. Please only use Delvac-1, or Mobil-1 15W-50 or 0W-40. All the xW-30 weights are not aproved by MB for use in their engines, they are too thin! Amsoil and RedLine also make excellent diesel oils but they ususally cost more. DO NOT use Castrol Syntec and I'd also avoid Shell Rotella "synthetic", as both are hydrocracked dino oils with lots of viscosity improvers & additives tossed in to make it act like a synthetic. Don't be fooled, the Mobil/Amsoil/RedLine products are the real deal.
Try it out & report back, I bet you'll like the results!  Oh, btw, I use Delvac-1 in my diesel fleet. 
Regards,
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Hmmmmmmmmm . . . OK
OPINION and LIABILITY are two TOTALLY different things.
I would NEVER make such a BROAD statement WITHOUT SPECIFIC INFORMATION regarding the ENGINE'S CONDITION. I've sold SYNTHETIC lubricants at my shop for years, and have learned a few HARD lessons in the process.
I've seen HIGH mileage engines convert to SYNTHETICS with GOOD results and some NOT SO GOOD . . .
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