50K Amsoil drains.

[M.T.Wallet]

Test was done by Oil Analizers Inc.
Iron 29/ 136
Chromium 0/ 0
Lead 1/ 6
Copper 50/ 79
Tin 2/ 4
Aluminum 4/ 10
Nickel 0/ 0
Silver 0/ 0
Manganese 3/ 6
Silicon 7/ 22
Boron 18/ 37
Sodium 5/ 6
Magnesium 20/ 46
Calcium 4309/ 4370
Barium 0/ 0
Phosphorus 1268/ 1245
Zinc 1331/ 1311
Molybdenum 0/ 6
Titanium 0/ 0
Vanadium 0/ 0
Cadmium 0/ 0
Soot NA/ NA
%oxd 8.9/ 42.2
%nox 21.4/45.7
First# is at 20697 miles Second# is at 29195 miles
My understanding is that Oil Analizers is a subsidiary of Amsoil.If anyone can tell me if this looks ok or not please advise.My truck holds about 9 1/2 quarts of oil.Thanks

[ April 14, 2003, 09:49 PM: Message edited by: M.T.Wallet ]

 

[Pablo]

I will say your iron is very high. I can say that you got almost 30,000 miles out of your oil, so it's time for a change. At 20K all was pretty good, but in the next 10K iron wear rates took off. What was the TBN?

 

[M.T.Wallet]

The TBN says NA I assume that means Not Available? Why would they not list it?

 

[Steve S]

Patman I personally met a courier that had a nissan 4 cyl. pickup using 10w40 ams a foam filter and oil filter when amsoil had the filters full of cotton waste just like the hastings.did the 25,000 mile with a filter change half way through. But as a courior lots of miles fast and few cold starts. He sold the truck to the upline dealer. High mileage happens but petro oil gets long life too. The million mile trucks using Delo, Rotella ,delvac are over the road trucks . I would like to see a survey on around town or local driven trucks.

 

[greencrew]

I went about 50,000 miles on the same oil change twice with an 85 Subaru Turbo using Castrol the first time, and Valvoline the second time and a by-pass filter.

I don't agree with the use of the phrase "same oil change" because I had changed the by-pass filter every 2000 (to 3000) miles, and as a result added 1 quart of new oil every 2000 miles. Plus, I changed the regular oil filter every 6,000 miles which required more new oil.

The turbo chager was oil lubricated and oil cooled and still worked at 144,000 when everything else wore out and I junked it. I did know not to engage the turbo before I shut it off.

That care was driven about 13,000 - 15,000 miles a year on local trips for about 11 years.

 

[buster]

The issue I have with this is WHO wants to go more then 20k miles on the same oil? Unless you drive a tractor trailer, I'd rather change the oil 2x a year or even once a year if you average 12-15k miles per year. I average 48k the last two years, soon to be down to about 30k and I won't even push it that far. Your right though, some of these guys are adding so much oil that it is essentially getting changed every x amount of miles. If your car doesn't burn any oil and your using a regular filter, forget it. There is not enough evidence out there to convince me that anything above 15k miles is safe. It's just not worth it IMO>

[ April 15, 2003, 09:47 PM: Message edited by: buster ]