Amsoil 15w-40 oil

I run the 15w40 diesel and marine oil in my 6nz. I change oil filter around 13000 miles and add oil to fill. and oil sample each time. drain at 50000. oil samples always come back saying oil is still good. hope this helps, cubie

 

I use rotella t6 5w-40 with cat filter. Change both every 20k. Used to test every time until results kept coming back with 5% fuel in them. Then Milton decided that was qoute " normal for the new engines". No more testing anyway , Walmart has good prices on rotella.

 

Unless you are going for extended drains, or have a real special application, there is really no need to spend so much on a synthetic oil. Check some threads along this line at the BITOG web forum. There are a lot of petroleum experts at that site, and dnewton3 over there is a real knowledgable one. Going by his recommendations, if you are not going for extended drains or running in well digger in the Kondike cold temps, there is no real benefit to running a synthetic engine oil.

I have had great results from a very good priced oil I get at my local farm and fleet. Mystik JT-8 15w40 I get for around $58 for a 5 gal pail. Truck has 874,000 on it, gets over 7 mpg average, and the oil samples look as good as they did at 300,000 miles. Change it at around 20,000 miles. Last sample..... iron 3, lead 9, tin <2, chromium 3, aluminum 3, no water, no glycol, no fuel. Good enough for me.


The Amsoil products are very good. I use some of their stuff in other equipment I have. But to really make it cost effective with a big truck, then you have got to run a bypass filter to keep the oil cleaner and go for extended drains. Otherwise, what is the point. Unless you just like spending money. The stuff you mentioned, at preferred customer pricing, is $27.75 a gallon. Mighty pricey, and you still have to add shipping (unless you are close to a dist center and can pick it up) and tax.If you are bound and determined to run a synthetic, I just checked a few days ago at Walmart, and they have Delo 400 LE 5w40 full synthetic at the store for less than $20 a gallon. Your call.

 

I am a creature of old habit. use dino oil delvac or retella, which ever is on sale. change every 10,000 miles, never more than 11,500 the last year getting oil at $9.00 a gal. no tax, no recycle fee. 9 bucks total.

 

The cold temperature performance of the synthetics is worth it to me. But I live up north and park my truck at home every night, even though I plug it in the piece of mind is priceless .

 

Yeah, like I stated, if you have a special application like staying in extreme (and I do mean extreme) cold frequently, then synthetic is a good choice. Or going for those extended drains.

Amsoil has their BMK-30 bypass system for a real reasonable price compared to other bypass systems. They show a 90,000 mile interval for it. I know a couple of truck owners that regularly extend their oil changes to 60-70,000 miles using it, and still the oil samples ok. And one of them is not using a synthetic. They have their limit they can live with. There are others who have taken their oil change further. I guess each one has to live within their comfort zone.

As long as the oil samples show the oil is good, there really is no need to change it. There is really no benefit of changing out good oil. And since the dirt and contaminates, as well as the additive package is tested in the sample, if the oil is still low in soot and contaminates, and the additive package is holding up, no more wear is going to occur and changing the oil is not necessary. It is a misconception that just because an oil isn't as clean as it was out of the jug, that it is bad and needs to be changed.

But if one is comfortable with regular oil and normal drains, there is nothing wrong with that. Again, each person must live within their own comfort zone. What I find amusing, is when the synthetic oil marketer trumpet extended drains as not wasting oil, it is only marketing. Used oil is recycled, cleaned and filtered, and used again as motor oil. There are several brands that this is exclusively what their oil is, and one I know, Northland, puts out some pretty good engine oils. One thing I am sure of though, there is not a diesel oil on the market that can't make it to 20-30,000 miles before needing changed. That includes the wally world brands. But some feel comfortable with 10,000 mile OCI's or whatever. No problem by me.

 

I run Baldwin most of the time, if I can't get to the city to get them I run napa gold filters. They are full flow filters that is why I change them so often. I've run amsoil in about every thing i have including my racecars and its realy good oil. my motor has about 400000 on a rebuild. it used about 1gallon between changes with rotella and does't use any with amsoil. I've ran it in this truck for a couple of years now and it has saved me money over the long run. Of course every bodies engine and results will differ. cubie