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Old 08-06-2009, 10:41 AM   #1
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I was looking into getting the amsoil 25000 mile oil, but they dont offer it in a 5w-20. The mechanic said that if I wanted the 25k oil I would need to use 10w-30. My truck has 95k on it now. Should I just stick to royal purple, or can I change to the amsoil?
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Old 08-06-2009, 11:09 AM   #2
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Default Whatever Makes You Happy:

Quote:
Originally Posted by Squirtbottle09 View Post
I was looking into getting the amsoil 25000 mile oil, but they dont offer it in a 5w-20. The mechanic said that if I wanted the 25k oil I would need to use 10w-30. My truck has 95k on it now. Should I just stick to royal purple, or can I change to the amsoil?
Lubrication engineer, Kit Sullivan, says in his lengthy treatise on engine lubes that oil is oil is oil. As long as the product you use is certified API SM then it will serve and serve well.

Based upon Sullivan's recommendations I use Wal-Mart's Supertech 10W30 full synthetic in my car and trucks. The product has included in its additive package a very effective seal conditioner that really helps older engines retain oil control. The product is the equal of any other similar product out there, but costs about 1/3rd less.

So, do as you will. If you want to spend the bucks on Royal Purple, Mobil 1 or Amsoil, go ahead...no harm except to your wallet.
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Old 08-06-2009, 11:44 AM   #3
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I'd go along with Kat on this, the most important factor with oil changes is the type of mileage you do, continual long runs means longer periods between oil changes short trips the opposite, in worst case scenario change at 3,000 mile intervals. Oil is in fact oil, providing you adhere to the manufacturers recommendations on viscosity, any oil meeting that spec will suffice, I prefer Pennsoil Platinum 10-30 in my 1986 351W.

Happy Motoring!!
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Old 08-06-2009, 12:20 PM   #4
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Well I do a lot of in town driving, and idleing. So im not going to run it the entire 25000 miles that its rated. I will probably do ~15000 miles. Im at ~8000 miles now on my royal purple change. That 15000 miles will probably last me about a year.
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Old 08-06-2009, 02:05 PM   #5
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Default Kit Sullivan's Article:

Go here for an education in engine lube oil and its applications:

http://www.lincolnsonline.com/tech/00105.html

One caveat about Wal-Mart's S-T brand oil filters: The supplier has been changed about a year ago and the newer product is not, in my opinion, good quality.
I use Motorcraft filters for the most part along with an occasional Wix or Purolator product.

BTW: If you want to run a long time between oil changes, then use a fleet-service oil such as Shell Rotella-T 5W40 full synthetic, the
stuff used in over-the-road diesels. The additive package in the oil is very robust and is designed in part to keep particulate contamination
in suspension (soot in the diesel). Any other oil classified API SM I would change out at 5000 miles intervals no matter what the manufacturer
claims.

Cheers

Last edited by Kattumaram; 08-07-2009 at 02:48 PM.
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Old 03-22-2010, 11:56 PM   #6
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Or go to http://www.bobistheoilguy.com/forums...s.php?ubb=cfrm. Lots of good info there also.
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Old 03-23-2010, 05:50 PM   #7
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Wow this is a SUPER OLD THREAD! Lol.
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Old 03-23-2010, 05:50 PM
 
 
 
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