Oil & Fuel Hey Guys, I need help with engine oil!

[JerryG]

I use Mobil Delvac synthetic 5w-40 year around.

That's what I have used for a while and really like it except the bottle says Mobil One Turbo Diesel Truck. It is easier to get that way where I live than with the Delvac label.

 

[Lockport]

Here is the link for Mobil1 10W-30 synthetic oil (Great in the winter!) and if you will note the fourth 'bulleted' line "Requirements for Diesel Powered Vehicles where an API CF or API CD is Recommended".

 

[Old School]

A "must"?

That would be news to a lot of folks.

In my book YES.

Notice I didn't specify brand or weight preference. "To each his own".

I'm not going to knock you for what your using but let me ask you this:

1. Why do jet engine and turbo prop aircraft only run synthetic?

2. Why do Corvette's, Dodge Viper's, BMW's, Mercedes and a host of other high end, high performance cars come from the factory with synthetic and recommend or require synthetic to meet their extended drain interval requirements?

3. Why doesn't conventional oil promote a change interval of say 15,000 or even 10,000 miles?

4. Why does your vehicle start better at -20F with synthetic?

I could keep going but I believe you get the idea. I'm not trying to belittle, but instead present some facts to think about. Thirty plus years experience, training and study lead me to my conclusion. I'm sure you were just being Facetious.

 

[cp1969]

My point was that it can't be a "must" because a lot of people don't do it. A "must" would be, "You MUST put fuel in your tractor if you want to use it." That is a "must."

Therefore, it has to be an "option" because many, like me, have opted not to.

 

[Bird]

We've had an ample supply of arguments in the past as to the importance of using synthetic oil, so let's please don't rehash that again. Yes, as Old School says, synthetics have some advantages and yes, as cp1969 says, it's not a "must". It's up to the individual to decide whether the advantages of the synthetic are worth the extra cost.

 

[Old School]

Bird, I couldn't agree more.

Apparently there was one word, "must", in my original post that was found to be offensive.

I come to the forum to get ideas, some help and share some thoughts, analyzing other peoples posts isn't one of them.


P.S. What's the speed of the power turbine if the compressor turbine is at idle?
Any idea CP1969?

 

[ndnparts]

CAT and Cummins do show oil change intervals at around 15,000 miles or one year (whichever is first) in their diesel engines, without any requirement for using synthetic oils. I'm not saying there is anything wrong with synthetics, but most major trucking companies do not use them in the engine because of cost from 'frequent' oil changes, yet they run millions of miles. Stan

In my book YES.

Notice I didn't specify brand or weight preference. "To each his own".

I'm not going to knock you for what your using but let me ask you this:

1. Why do jet engine and turbo prop aircraft only run synthetic?

2. Why do Corvette's, Dodge Viper's, BMW's, Mercedes and a host of other high end, high performance cars come from the factory with synthetic and recommend or require synthetic to meet their extended drain interval requirements?

3. Why doesn't conventional oil promote a change interval of say 15,000 or even 10,000 miles?

4. Why does your vehicle start better at -20F with synthetic?

I could keep going but I believe you get the idea. I'm not trying to belittle, but instead present some facts to think about. Thirty plus years experience, training and study lead me to my conclusion. I'm sure you were just being Facetious.

 

[Old School]

CAT and Cummins do show oil change intervals at around 15,000 miles or one year (whichever is first) in their diesel engines, without any requirement for using synthetic oils. I'm not saying there is anything wrong with synthetics, but most major trucking companies do not use them in the engine because of cost from 'frequent' oil changes, yet they run millions of miles. Stan

ndnparts that's a excellent point!

In my initial post you will find a reference to filters. Take a look at the filters used on CAT and Cummins, more than likely it's made by Donaldson Corp, maker of some of the best filter you can buy, and is four times the size of a regular filter, has a efficiency rating two to three times that of your car. Also the volume of oil held in those engines is greater so the same oil takes longer to be cycled back through the motor. This is one of the reasons the over the road semi doesn't need to change its oil as often.

 

[Scrounger]

I run 15w40 only. That's also what I was told to use by the dealer. Never had an issue.

Since everyone from Nazareth is correct, I have to agree with drtydeeds.

 

[Harry c]

Old School]

2. Why do Corvette's, Dodge Viper's, BMW's, Mercedes and a host of other high end, high performance cars come from the factory with synthetic and recommend or require synthetic to meet their extended drain interval requirements?

If I'm not mistaken, no Mercedes comes from the factory with synthetic anymore. In fact, they don't even come with new oil! I believe they are using re-refined used oil in every car! GREEN and all you know.

In my initial post you will find a reference to filters. Take a look at the filters used on CAT and Cummins, more than likely it's made by Donaldson Corp, maker of some of the best filter you can buy, and is four times the size of a regular filter, has a efficiency rating two to three times that of your car.

My apologies, and not that it's a big deal, but Cummins uses filters produced by their Cummins Fleetguard division. They manufacture filters for Cummins and many other engines. They have quite a large manufacturing plant in Cookeville,TN maybe elsewhere as well.