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Old 11-12-2008, 14:22   #1
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Oil additives?

I'm just finishing a class on diesels and the teacher recommends adding an oil additive but made no suggestions.
Anyone have any recommendations?
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Old 11-12-2008, 14:52   #2
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Lucas

oil treatment is what I've added to the crankcase of my Universal M18 for the last 6 years, as well as my 2000 Subaru Outback that now has 185,000 miles on it.
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Old 11-12-2008, 15:14   #3
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Regular changes at 100 hours with new filters is the best thing instead of adding extra crap. Oil adatives are mostly magic.
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Old 11-12-2008, 15:23   #4
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Several knowledgeable folks including the manufacturer of our current engine recommends against adding anything to the oil and stay with a good oil and filter change schedule. If it needs an additive it probably needs service to correct the need for an additive. They do recommend additives for the fuel but definitely nothing in the oil, including Synthetic oil.
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Old 11-12-2008, 15:24   #5
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Quote:
Originally Posted by Pogo-2 View Post
oil treatment is what I've added to the crankcase of my Universal M18 for the last 6 years, as well as my 2000 Subaru Outback that now has 185,000 miles on it.

No way to know for sure but I would wager that Subaru would have reached 185,000 without the additives.
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Old 11-12-2008, 16:36   #6
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Quote:
Originally Posted by Pogo-2 View Post
oil treatment is what I've added to the crankcase of my Universal M18 for the last 6 years, as well as my 2000 Subaru Outback that now has 185,000 miles on it.
What he said. The Lucas products, as a group, are quite good. They have a synthetic-type oil additive that I use in my 25-year old Perkins.
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Old 11-12-2008, 19:05   #7
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Originally Posted by Pblais View Post
Regular changes at 100 hours with new filters is the best thing instead of adding extra crap. Oil adatives are mostly magic.
what he said.
I only use three oils.
Shell Rotella T, Chevron Delo 400 or Mobil Delvac. pick your weight 15w40 or 30SAE.
My Cummins is 3 years old with 181K on these oils.
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Old 11-12-2008, 23:07   #8
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There are a engines makers that recommend additives during a break in period due to material properties of rings and cylinders. There are manufacturers that will recommend a mineral oil for break in as well.

Beyond the break in period using the recommended oil,changed at the right interval is enough.
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Old 12-12-2008, 05:19   #9
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Snake oil for the most part. But if you insist I have a great spark intensifier for your deisel you can have for a few hundred bucks. Ron Popeil swears you'll increase your deisels gas mileage by 30%.
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Old 12-12-2008, 07:41   #10
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Many of the additives just put back the Zinc that was in oils of yesteryear. The Zinc, ZDDP, lubricated and sealed the bearing and contact surfaces of friction producing parts. Look up "Bob is the oil guy" for some interesting facts.

Goto: http://www.bobistheoilguy.com/
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Old 12-12-2008, 08:47   #11
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Frequent oil changes will do more for longevity than additives. Oil breaking down and reducing its lubricity, changing its pH, and losing its additives is what causes premature engine wear. Additives don't really compensate very well for that.
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Old 12-12-2008, 22:37   #12
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No way to know for sure but I would wager that Subaru would have reached 185,000 without the additives.
My '97 Outback has 223,000 miles and climbing. No additives.
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Old 13-12-2008, 05:03   #13
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GordMay--Thanks for the edit. New to this forum stuff, and wasn't sure how to add link.
Another one of my loves is big ole Ford V8s in '65 Cobra cars. Getting those old technology engines to turn 6k rpm, and survive, with modern eco-friendly lubricants requires additives sometimes. Bob is a lot of help.
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