Amsoil Products

With so many other synthetic oils out there that you can find without the dealer network used by Ams-Oil the question would be is there oil product that good?

One of the biggest problems with new oil is the zinc/phosphorus reduction to keep converters from going bad.
Valvoline has found a way to keep the zinc/phosphorus in the oil and not in the converter.
No other oil has this at the present time.
Valvoline has this in all of their oils.

Interesting this came up. I just got back from taking Ford's mechanical engine repair class. One of the other guys had just pulled a 5.4 from about a 2 year old F150 for knocking noises. The owner was using Amsoil and was following their extended drain intervals and just changing the filter. The pan was full of sludge that plugged the pick up tube which starved the engine for oil and ruined the rotating assembly. Ford voided the warranty for lack of care. An Amsoil rep came, took pictures, and had the vehicle hauled away all torn down. They were guessing Amsoil paid for a replacement engine. My take on extended drain intervals is "Not on something you plan to keep long term". If Amsoil is really that much better, why is it so hard to find a dealer for their products? I would think they would want every opportunity to have their products in front of a potential buyer. Either way, if you change every 3K like me, at 170K you can pull a valve cover and find the engine as clean as the day it was built with conventional oil.

Check out Valvoline's engine guarantees.

https://valvoline.promo.eprize.com/engineguarantee/

They are probably the best oils out there, and if you do a lot of freeway mile driving and you don't have fuel dilution they work on extended drain intervals.

As to what Brian posted, No oil, sythetic or dino, will protect from sludging if you take very short trips all the time.  If the engine is not warming up and staying there for say 30 min. then the water is not being forced out, do not use extended drain intervals with any oil if your vehicle is used like this. 

I personally used to use amsoil in most every thing, but have gotten away from them.  Their test(only one that will show test for the most part) always showed other synthetics right behind theirs(especially mobile one).  The way they sell it is a big hassle and is expensive.  I also don't do the highway miles any more.  I pulled their bypass filters off my engine and have switched to mobile one, changing at 5000 miles in the summer and 3000 in the winter.  Its much cheaper, when its on sale at autozone(only thing I buy there)  I also use the mobile one Vtwin in my harley, excellent oil, comparable to the harley synthetic at 4-5 dollars a quart cheaper.  I still get the fuel economy advantage with mobile one as I do with amsoil, and the inside of my engines when scoped are very clean and cylinder wear on my dakota(160000 miles, on amsoil for first 130000, mobile one currently) is negligible, most of the cross hatching still visible when scoped.  Same with my wifes Honda fit(60,000 miles)

  I still use rotella in the tractors/big truck are not running enough miles/hours to warrant the longer life of synthetics but still wanting to change the oil at least every year to prevent corrosion from water condensation. 


Edited by firebrick43 - 09 Aug 2010 at 10:15am

I also used to be a big fan of Amsoil and ran it in everything I owned until I had to have my 5.7L Chevy engine rebuilt @ 150K.  Always changed oil @ 6K miles with filter every time.  Engine builder said the timing chain was so loose it would have came off very soon and the heads required rebuilding.  Oil pressure was getting close to the red at idle.  Not a fan any longer.  It's expensive.  Shipping is expensive.  Not worth the 6-8 buck a quart cost.

Brian, I had the bypass filters, problem was that they were nearly 50 dollars for the 2 filters on the mount.  I also didn't like the time it took for the oil pressure to come up on the gauge.  I imagine that if you had the electric preoilers that wouldn't be an issue.