i have owned 5 ford super duties over the last 20 years and i have had great results with amsoil. everyone one of my trucks since 1988as had amsoil in them . iv had absolutley no problems with their products. oil ,trans fluid, gear oil. so good luck with your oil hunting . but my recomendation would be amsoil. and no iam not a dealer.

 

The only trouble with Amsoil has been with the 6.4. Have always heard good things about Amsoil until the 6.4 came along. Could be coincedence and I am no expert. Just recommend anyone do some research before using it on a 6.4

 

I use Lubrication Engineers 15W40 year round in mine, with 200 hour oil changes and oil analyses each time. Most of my driving is heavy towing; hence the more frequent oil changes. I've started adding Lucas synthetic oil additive as well.

It does not typically get below 20 degrees where I live.

Compared with my other vehicles, the 6.4 oil analysis typically reveals more fuel contamination in the oil as opposed to my other diesels.

 

I use amsoil and have had no problems although so far I have only 4000 miles on my new 6.4 truck. I also had Amsoil in my 7.3 that had 80000 miles with no problems. I also use it in my john deere tractors, freightliner semi and pretty much everything else I own.

 

Wow! I wish I could afford that! $34 a gallon...10 gallons....one PRICEY oil change!

 

I would rethink the amsoil. Does not work to well in the 6.4. And I would not want to gamble on extended intervals either.

 

I buy it in a 30 gallon drum which figures out to about $5 a qt thats not to bad in my opinion. I also use the oil analysis religiously but I understand everyones concerns.

 

Senix I am curious what problems have there been with the 6.4? I am not against switching my oil if there is good reason.

 

sludge issues and not being up to spec for Ford and the emissions for the 6.4. Here is a thread from diesel stop that I have been following:http://www.thedieselstop.com/forums/...-6-4-a-229198/

 

From another site with a blown engine......

I really don't care what "studies" show or what Amsoil says, one thing I believe are my two eyes and I was not impressed at all with Amsoil when I had my motor apart in my 6.4. The truck only had 40K miles on it and I had been running Amsoil since 500 miles, there was gunk and build up every where and I changed the oil every 4K miles, even the tech asked me if I changed my oil regularly. Amsoil maybe great in other applications, but for whatever reason, its not a good oil for Powerstrokes........if don't believe me ask any tech on here what they have seen with Amsoil

And from a different person with a blown engine.....

I asked the dealer why i would have had a stuck push rod and he was eager to tell me that it was the Amsoil i was running. I got some samples of it actually to take in for analisys. He said it was so gummed up, it looked like it had 40k on it. Even though it was changed 2000 kilometers ago. He also informed me that ford WILL NOT warranty any engine work on a new diesel that is running Amsoil. Just thought i would let everyone else know that fact in case they run into the same problem.

Or this one

its happening to alot of the new engines running amsoil.

or

this not the first stuck lifter or engine failure issue that has been linked to AMSOIL

I can find plenty more, just do a search on any of the major diesel internet sites. Im not testifying to these statements, but its enough of a warning to scare me off. Maybe they are opinions but these comments are coming from customers as well as techs. Each of us just needs to do our own research and make our own decisions.

 

Just trying to figure out what is right and what is wrong not arguing with anybody. I looked at the thread link that you gave me above. From what I can tell they guy having all the issues was 1st having coolant leak issues and 2nd he was using the wrong oil for the motor. He was using the Amsoil HDD oil which is for pre 2007 not for the new emission crazy motors. Its not CJ-4 rated.

 

OK guys here's my plan. Every year, come December before it gets too cold here in Georgia I hook up the fifth wheel and pull it to Naples. I save a lot of money on oil changes that way. Now, if I can just get through the winter without ripping a fender off this dooley.

 

Your in GA. They don't have winters there.

 

i live in Phoenix where it can get hot, hot. Just bought a 2010 6.4 (will post some pics soon) and just did my first oil change with Rotella 15-40. I want to run Mobil 1 but there is no 15-40 - closest is 5-40. Any ideas if that is a good call?

 

Look in your diesel supplement. You'll find this:



5W-40 can be used in all temperature ranges. It's required for cold weather, and an option for warm weather. 5W-40 is typically a synthetic only oil, therefore most of us would prefer conventional 15W-40 in the summer.

If I lived in southern AZ I'd use Motorcraft 15W-40 year round. $36 for 15 quarts at wal-mart for factory-specific fluids. Can't beat it!