I'm realively new to diesel, i just have a couple of questions. What makes amsoil good. I have 179,000 miles on a 96 powerstroke ford, what would the correct type and oil weight i need to use, Thank you. -

Gentry, first off, welcome to the forum.
To address your first question of what make amsoil good? Compared to other synthetics, it does hold its own. They are a company that is not out to compete and be the cheapest on the shelf. Price is not a driving force in developing their products. They tend to have "beefier" additive packages. Almost all of their products are made with group 4 and 4 basestocks. Many "synthetics" on the market today are made with group 3 basestocks. A little less expense and not quite as good, but still a good product. OA reports show consistently good results.

As for your truck, anything over 100,000 miles you should consider a few things first. Is your truck currently using or leaking any oil, and to what rate? Chances are when you switch, this will not get any better, and likely will get worse. If it's a rate you can live with, than by all means make the switch.

I'm assuming you just purchased this truck...do you know the maintenance history on it? If not, there is always a slight chance that it could be in "used" condition. There could be significant sludge and varnish buildup, some of which may be acting as gasket plugs. Synthetics can clean this out and possibly spring new leaks for you.

Any truck over 100,000 miles that switches should consider either doing an engine flush, or running a couple of short intervals (5-7K) to do the cleaning. Then you are good to go 15,000.

With all that being said and you think you are in good shape to make the switch, then our product of choice for your truck would be the 15W-40 marine and diesel oil (AME).

If you get to that point and would like some pricing, or have any other questions, feel free to contact me.

Heath -

Heath's Sig:

AMSOIL Regency Direct Jobber
My AMSOIL Website
Buy AMSOIL at wholesale/purchase options.
Have questions or want pricing? Contact me

thanks for the info heath. I recently found atf leaking around the bellhouse today, not a bad leak. But i am flushing the engine and getting everything checked out. Thanks for your info and i will check that out. -

Hi Heath, just wanted to toss in an observation. Sometimes when one switches to Amsoil, an oil leak may look worse but most of the time, it is only just that; looks. Synthetic oil tends to travel farther from the leak than conventional oil before it hits the ground and gives the appearance of a larger leak. The true story with either type of oil is how much the level goes down on the dip stick. Chaplaintoo -

Agreed -