I have a 76 motorhome with a Dodge 440. Is it beneficial to use diesel oil in this engine because of the extra additives and heavier duty?
Diesel Oil in gas engines?
- Thread starter NormStow
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Your motorhome sounds like a perfectly good application for 15w-40 diesel oil to me. I lean towards Rotella, but any of them would work just fine.
Ahhhh, the 440. When I was a kid, my best friends parents had a Dodge Sportsman factory conversion van with a 440. They used it to pull a travel trailer with a bunkhouse.
We would take it out and it would roast those tires with ease anytime we wanted it to.
Ahhhh, the 440. When I was a kid, my best friends parents had a Dodge Sportsman factory conversion van with a 440. They used it to pull a travel trailer with a bunkhouse.
We would take it out and it would roast those tires with ease anytime we wanted it to.
Thanks. I appreciate your help
X2..yes a Diesel Oil would be the ideal choice.
I run Amsoil Series 3000 which is a HDEO for diesels and gas engines with no ill effects.
Watch out for the new SM diesel oils....
I second that caution. The new 15W40 Rotella dino IS now "SM" and I hear their synthetic Rotella 5W40 is being changed to "SM" later this year. If I had an older generation sliding tappet engine, I would definitely be looking for an HDEO with a pre-SM API rating.
Kinda off topic, but the thread title reminded me of this.
Back in '76, the guy that owned the truck stop that I worked at would have me put one gallon of diesel fuel in his '74 Lincoln Continental when he would get it filled up. I never asked him why, but thinking about it now I suppose the theory of the day was lubricity, what we would use Lucas UCL for now.
I drove a 440 once. A friend in the early '80s bought a '70 Plymouth GTX with a 440 six pack 4 speed. He let me drive it one day. We were on a long, fairly steep hill just outside of town, going uphill, doing about 50, 4th gear. I was curious to see what it would do if I floored it, under these conditions, without downshifting. The thing still threw me back in the seat. I couldn't believe it. Just an insane amount of torque.
Even back then, with $1 gas, he couldn't afford to keep it. That was a lot of hungry horses to feed. So, he didn't have it for very long, less than two years as I recall.
What a car.
Back in '76, the guy that owned the truck stop that I worked at would have me put one gallon of diesel fuel in his '74 Lincoln Continental when he would get it filled up. I never asked him why, but thinking about it now I suppose the theory of the day was lubricity, what we would use Lucas UCL for now.
I drove a 440 once. A friend in the early '80s bought a '70 Plymouth GTX with a 440 six pack 4 speed. He let me drive it one day. We were on a long, fairly steep hill just outside of town, going uphill, doing about 50, 4th gear. I was curious to see what it would do if I floored it, under these conditions, without downshifting. The thing still threw me back in the seat. I couldn't believe it. Just an insane amount of torque.
Even back then, with $1 gas, he couldn't afford to keep it. That was a lot of hungry horses to feed. So, he didn't have it for very long, less than two years as I recall.
What a car.
Diesel oil is what you put in the fuel tank ,Heavy duty engine oil like Delo 400 ,Rotella , Mobil 1300, Schaffers has a couple of awesome hdeo's etc
"I just had do tease." is the oil you want. No need for syn unless it is below 15F.
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I have a 1992 Winnebago on a GM P-30 chassis with the FI 454. I use Rotella T 5w40 synthetic. It is now rated SM. I add a bottle of SLOB with each oil change to boost the ZDDP closer to SL levels. 82,000 miles, runs strong, burns maybe a pint between changes. I'm happy.
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Diesel oil is what you put in the fuel tank ,Heavy duty engine oil like Delo 400 ,Rotella , Mobil 1300, Schaffers has a couple of awesome hdeo's etc"I just had do tease." is the oil you want. No need for syn unless it is below 15F.
However, you still knew what we meant....
I'm new at this, but as I understand it SM rated oil is limited as to the amount of Zinc and Phosphorus allowed. I think less than 1000ppm. Engines with flat tappet cams need the higher levels of Zinc and Phosphorus to avoid premature lobe wear. SL rated oils are permitted to contain higher levels of these additives. There may be other differences I am not aware of.
IIRC, that only applies to SM rated oils of certain "popular" viscosities such as 5W-30, 10W-30, etc. I don't believe the same limits apply to say a 5W-40 or 15w-40.
Cripes folks, lets post some facts!
It's not the API SM that limits phosphorus, and therefore zinc, it's ILSAC GF-4. You can have an SM oil with 1200 ppm zinc, like GTX 20w-50 and Havoline 10w-40 and 20w-50 SM oils do.
Regarding CI-4 plus heavy duty oils like Delo and Rotella, they still have way over 1000 ppm zinc, like 1200 ppm or so. They do not have the low zinc levels that starburst GF-4 passenger car oils have.
It's not the API SM that limits phosphorus, and therefore zinc, it's ILSAC GF-4. You can have an SM oil with 1200 ppm zinc, like GTX 20w-50 and Havoline 10w-40 and 20w-50 SM oils do.
Regarding CI-4 plus heavy duty oils like Delo and Rotella, they still have way over 1000 ppm zinc, like 1200 ppm or so. They do not have the low zinc levels that starburst GF-4 passenger car oils have.
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