Well, I went to Wal-Mart, Autozone, and Orielly's today to check on what oils they stocked. Between the 3 of them, I found Mobil 1 Delvac 1300 Super and Rotella Synthetic both in 5W40. I have yet to check Napa, I will call them tomorrow as there isn't one in my town. Anyhow, I have yet to see the new Mobil 1 Turbo Diesel Truck 5W-40. Their website didn't post any release dates, so I assume its already out. Has anyone seen it? Is it even available over the counter or is the a special order only? I'm about to hit 6k on the truck and I'm ready to change the oil.

Delvac 1300 Super is 15w-40. If those were my two choices for summertime in Houston, I'd use the Delvac 1300 since it's cheaper, & Rotella Synthetic is just hydrocracked dino oil, so you're not going to get any of the benefits of a true synthetic. They're both good oils, though.

I haven't seen the new Truck & SUV anywhere locally yet. The only source I've found so far is AV Lubricants.

I really want to stay with a full synthetic and don't want to go through the trouble of having to order it. I'd rather buy it over the counter. I was really set on the Mobil 1 Turbo Diesel Truck oil, but I can't find it. Does anyone have any info on it?

You could use Delvac 1. Most major Truck Stops carry it. It's (arguably) the same thing as Mobil 1 Truck & SUV 5w-40, & probably pretty close to the new Mobil 1 Turbo Diesel Truck 5w-40.

you're not concerned with engine brake-in before switching to synthetics?

not that i have a strong opinion either way, just curious.

I called Napa and no luck. They did carry Royal Purple 15W40 and Mobil 1 Truck & SUV 15W40. So I called Mobil 1 direct and ask if it was already released. They stated that it was and gave me a number to one of their dealers closest to me. Well, the first time I talked to them, they said that didn't have any in stock and would call me back with an estimate when they could get it. Well when they called back, they discovered that they got 11 boxes in by accident. Each box contains 6 quarts. Anyhow, they wanted $36 per box which is $6 a quart. Do you think that's a reasonable price?

How much is Amsoil? If the price is cheaper or similar, I might as well use Amsoil.

nosliw, what do you mean?

I called Napa and no luck. They did carry Royal Purple 15W40 and Mobil 1 Truck & SUV 15W40. So I called Mobil 1 direct and ask if it was already released. They stated that it was and gave me a number to one of their dealers closest to me. Well, the first time I talked to them, they said that didn't have any in stock and would call me back with an estimate when they could get it. Well when they called back, they discovered that they got 11 boxes in by accident. Each box contains 6 quarts. Anyhow, they wanted $36 per box which is $6 a quart. Do you think that's a reasonable price?

How much is Amsoil? If the price is cheaper or similar, I might as well use Amsoil.$6 per quart is cheaper than I've been able to find.

The chapest I've been able to find M-1 Turbo Diesel Truck has been at AV Lubricant at $37.95 + $12.36 Shipping for a case of 6 quart. that comes out to $8.39 a quart. :eek:

The next best was Mobil Delvac-1 Synthetic at my local part store and they want $30.29 per gallon ($7.57 per quart + tax)

So I bought Shell Rotella-T Synthetic 5W-40 for $3.65 per quart + Tax at Wal*Mart.

How much a quart is Amsoil going for?

$38 is really not that bad, but what kills the price is you have to pay shipping.

Can anyone speak for Shell Rotella T synthetic 5W40?

Amsoil direct from online without dealer pricing or preferred customer pricing is $6.10/Qt or $72/case or 12Qts or $93/ 4 gal which is about $5.82/qt, and shipping is About $11.50 for 4 gal, and filters Are about $17.50 per for oil filter. Also it is cheaper for preferred customers and dealers.

There's a few ways you can buy the Amsoil and either way I buy it, will come close to the price of the Mobil 1 Turbo Diesel Truck 5W40. So...which is better, Amsoil or the Mobil 1 TDT 5W40? Also, I checked Amsoil's site and didn't see a 5W40. Do they make it?

nosliw, what do you mean?


ring seating/cylinder scuffing/ect....

you know (in the small engine world at least) how they say you should break your engine in on dino oil? just because it's less slippery and that extra friction helps things seal together.

just a thought.

So you're saying I should do my first oil change with a cheap dino oil, then swap to the synthetic after that?

First on the 5W-40 I do not know of any Amsoil 5W-40 diesel oil, they do have the Series 3000 5W-30 that is CI-4+ rated, but they do not recommend it for the LBZ and it is more than the Synthetic Heavy-Duty Diesel & Marine Motor Oil.

And as far as breaking in on Dino, my opinion, and that is all it is, is my opinion, so take it for what it is worth, but the first oil change in any of my vehicles, be it a truck Motorcycle, race or street, my pressure washer, or my lawn mower has been to synthetic. So, I say go synthetic, and don’t look back, regardless of the brand, as long as it is high quality.

How much is Amsoil? If the price is cheaper or similar, I might as well use Amsoil.
I just placed an order last night for Amsoil 15w40 AND an EAO52 filter.
The oil (with preferred customer discount) was $43, filter $13, fir $56 plus shipping.
Shipping was $9, sales tax (ya, since Amsoil has dealers in every state they nail you for that) was about $5, total was $70.18

Remember, that's a single 2.5 gallon jug (10 quarts) and a $13 filter.

you're not concerned with engine brake-in before switching to synthetics?

not that i have a strong opinion either way, just curious.


The new LBZ engine will last 750,000 miles, regardless of break-in methods. These engine are machined and assembled in Moraine, OH by the UAW's finest workers, to the closest tolerances in the world.

Trust me, these engines will out last ANY engine in the world.

RichLockyer, would you be willing to order me the exact same products and send them to me? I'll send you Paypal. That's a really good deal. Again, I found the Mobil 1 Turbo Diesel Truck 5W40 for $6 a quart. I would have to pay taxes, but save on shipping as they're local.

So what do you think guys, Mobil 1Turbo Diesel Truck 5W40, Amsoil 15W40, Shell Rotella T 5W40 synthetic, or Mobil 1 Delvac 1?

RichLockyer, would you be willing to order me the exact same products and send them to me? I'll send you Paypal. That's a really good deal. Again, I found the Mobil 1 Turbo Diesel Truck 5W40 for $6 a quart. I would have to pay taxes, but save on shipping as they're local.
Go to www.amsoil.com and become a "preferred customer"... $20/year, and once your membership is activated (couple of days) you'll get the same prices buying direct.

$6 per quart sounds reasonable as Mobil 1 for gas engines runs about the same. Frankly, I'm surprised at the price. I would think they would have a higher intro price but maybe they considered that counterproductive to establishing a customer base for the new product.

I've had really good luck with the Mobil 1 synthetics in gas engines (138K on a 5.7L V-8 in the ImpalaSS with no leaks, ever!) and would not hesitate to move to their product for my truck. Wonder if the dealer will gouge me for some synthetic when I take it in for service?

$6 per quart sounds reasonable as Mobil 1 for gas engines runs about the same. Frankly, I'm surprised at the price. I would think they would have a higher intro price
They did.
When they introduced their new "EP" lines their pricing went to hell.
M1 T&SUV 5w40 used to be about $5.50 at Wal-Mart, but they had 5-quart jugs for $22.

ahhh...the good old 'quantity' pricing scheme, eh RichLockyer?

I never priced it before nor their EP line. When I went to synthetic on the Impala, it was on the first oil change. My dealer has a lifetime oil change program where the oil is basically free. A LOF on the Impala costs me $6, with Mobil 1, because I made sure they wrote in the sale contract that the oil to be used was Mobil 1 or equivalent synthetic because that is what GM "recommended" for the LT1 V-8 in the car.

I made a great deal on that one!

At this point, I'm torn between the Mobil 1 Turbo Diesel Truck 5W40 and the Amsoil 15W40. I like the fact that the Mobil 1 is a 5W40 compared to Amsoil's 15W40. What do you guys think is better between the 2?

Also, Royal Purple also makes a 15W40. I've had good luck with RP in my race car and have been using it ever since I bought the car.

My preference is Amsoil, the difference between the viscosity index is that the "lighter" product takes a bit less hp to pump through the engine - it increases mpg a miniscule amount. However, the "heavier" product has additional antiwear ingredients that make it a bit more viscous. The Amsoil will take higher temperatures than either of the other products, the Amsoil additive package is very extensive when it comes to antioxidants and antifoam agents. I have been using it for years and always use 20W40 or 20W50 depending on age of the engine - the older they get the heavier the grade (in this mild to hot climate).

Well I figured the Mobil 1 being a 5W40 was lighter than Amsoil as its 15W40.

Either one is a 40 weight and will be perfectly fine.
The M1 will have better cold-flow characteristics, being a 5w, but that's not really a concern in TX, and certainly not a concern during the summer.

Either oil will do you fine. I use whatever is readily available at a reasonable cost. M1 not having 5w40 synth on the shelf since November is what drove me to Amsoil.

Mobil1 is not a true PAO synthetic. It is simply a hydrocracked dino oil just like Rotella synthetic. Very good stuff, but not a TRUE synthetic. Mobil sued Castrol about their claim that Syntec was a synthetic. The court ruled that Castrol's claim that Syntec (also a hydrocracked dino oil) was a synthetic, was legitimate since the term "synthetic" was determined to be a marking term and not a scientific term. When Mobil lost the case, they changed their formulation (it is cheaper to hydrocrack) and no longer use the PAO process.

Would you care to support that assertion?

Amsoil buys their PAO base stocks from Mobil

There are only a couple of labs making G-IV base stocks.

Mobil1 is not a true PAO synthetic.

When Mobil lost the case, they changed their formulation and no longer use the PAO process.

These two statements are completely false.