This is completely wrong. Heavy Duty oils like Delo are "mixed fleet" oils. As such, they are rated for gas and diesel. They do have a higher level of additives, some of which are to help suspend the soot that a diesel produces. They have a higher detergent level and keep your engine clean. They also have a HIGHER level of anti wear additives. It is better motor oil. I read somewhere that the heavy duty oils give you close to the performance of synthetics, without the synthetic price. All the heavy duty oils I have ever seen also have a "spark" certification-ie SL, or now SM. Since the can be used with diesel motors, they also meet a "compression" standard, like CH or what ever is current. Delo is excellent stuff, and is dual rated. It's great in an older Land Cruiser, gas or diesel.djanis99 said:Deisel oils have a different additive package. you want an oul with an SJ, SG, SL, or S whatever rating the S stands for spark ignition which is what a gasoline engine is. I deisel engine is Compression ignition and thus has a rating of CD, C something for compression ignition. Deisel engines are different than gasoline engines, they run far hotter combustion tempuratures. As soon as you change the engine oil in a deisel it is black, I changed the oil in my gasoline truck 1,000 miles ago it is still yellow.
The owners manual says to use a specific "S" grade oil, why would you want to use an oil for a deisel? they make heavy duty oils for gasoline engines ...
I hope that this post helps,
The sludge that results from oil being burnt in the combustion chamber probably causes EGR passages to clog up faster than if there were no oil being burnt. Not to mention the intake runners (look at the runners in a recent Chevy EFI motor, like the Vortec 4.8 or 5.7).jwest said:If a gas engine burns oil, how would the use of an HDEO affect egr and emissions, as well as the catalytic convertor, as opposed to a PCEO?
Some newer Heavy Duty oils now boast that they're EGR safe. Meaning that some newer diesels employ EGR. What was wrong with older HDEO's that would preclude them from being used in diesel EGR motors.?
I was being rhetorical.Tinker said:HJ -
Not to be too dumb, but why are we looking in the intake runners of our Vortecs?