- Joined
- Dec 30, 2006
- Messages
- 29,558
I have a jug of Valvoline Premium Blue 15W40 waiting to go in my Z on my next oci.
anybody use diesel oil in gas engines???
- Thread starter jeepinjunkie
- Start date
- Status
Most new CJ4 oils are also SM rated .... that is API SM. Use anywhere an API SM rated oil is called for, so long as the weight is not an issue.
This is why someone very 'famous' on Bob stated that Rotella 10w30 CJ4 could be best 'sleeper' oil to the board that is available on the market.
This is why someone very 'famous' on Bob stated that Rotella 10w30 CJ4 could be best 'sleeper' oil to the board that is available on the market.
I use RTS 5W-40 in my 89 Dodge Caravan, 2.5L turbo engine with 207K miles at present. Excellent oil.
Go to NAPA. they can get any 10w-30 HDEO that they carry.
Actually, some walmarts carry Rotella T 10w-30. Its a little rare though
Actually, some walmarts carry Rotella T 10w-30. Its a little rare though
I visit several classic corvette forums. There has been an ongoing problem with cam failures for years now with the old flat tappet cams. After a lot of discussion it seems that most now believe the problem is oil related. From what I can tell probably a third of these folks are now using diesel oils. There is also a group adding small amounts of GM EOS with each change. No definitive answers yet on these methods, but so far the results are looking positive.
Originally Posted By: Mazatrol
After a lot of discussion it seems that most now believe the problem is oil related. From what I can tell probably a third of these folks are now using diesel oils. There is also a group adding small amounts of GM EOS with each change. No definitive answers yet on these methods, but so far the results are looking positive.
So you're saying diesel oil is possibly helping the problem or part of the problem?
After a lot of discussion it seems that most now believe the problem is oil related. From what I can tell probably a third of these folks are now using diesel oils. There is also a group adding small amounts of GM EOS with each change. No definitive answers yet on these methods, but so far the results are looking positive.
So you're saying diesel oil is possibly helping the problem or part of the problem?
I haven't formed an opinion on it yet. Just passing on thoughts from those I visit with. As I understand it they are thinking that the lack of additives in modern oils may be in some part responsible and that diesel oils may give more of what the older engines need. I suspect at least some of the replacement failures are indeed quality related, but there seems to be a disturbing number of original cams wiping lobes also.
The thrust of the "it's the oil" argument is that lowered levels of zddp have left oil with less anti-wear ability. However, newer types on anti-wear additives have been used to replace the formerly higher levels of zddp. So no one can really say for sure....
Many motorcyclists use HDMO in their bikes. Works very well in high HP/high performance bike engines. Lots of racers on a budget are using Rotella 5w40 in their track bikes with excellent results.
Drew
Drew
I used Rotella SYN 5w40 in my VW 1.8t. Too bad I crashed it before I could have seen results.
- Joined
- Sep 28, 2002
- Messages
- 39,798
These are typically engines with higher spring rates. If you've got normal spring rates ...you don't have to worry about it.
I've run HDEO in gas burning engines for years and never had a issue with it. I'll continue to do it until the Feds neuter HDEO to the point that it is no longer beneficial to do so.
Originally Posted By: Gary Allan
These are typically engines with higher spring rates. If you've got normal spring rates ...you don't have to worry about it.
No, if I think I know what you are referring to. Flat tappet cams/lifters need ZDDP to provide a buffer between direct metal to metal contact irregardless of spring rate. Flat tappet cams/lifters basic operating principle is direct contact, so you can see why a pressure additive is so critical to the life of these parts. This has been a very hot topic in the hot rod community and EVERY major cam manufacturer (Crane, Comp, Erson, Isky, Lunati, etc) say to use a oil with elevated levels of ZDDP in it if you are going to run a flat tappet cam. Call them and they'll tell you personally. In a perfect world every engine would use a roller cam, but that's not the case and hence the ZDDP issue.
These are typically engines with higher spring rates. If you've got normal spring rates ...you don't have to worry about it.
No, if I think I know what you are referring to. Flat tappet cams/lifters need ZDDP to provide a buffer between direct metal to metal contact irregardless of spring rate. Flat tappet cams/lifters basic operating principle is direct contact, so you can see why a pressure additive is so critical to the life of these parts. This has been a very hot topic in the hot rod community and EVERY major cam manufacturer (Crane, Comp, Erson, Isky, Lunati, etc) say to use a oil with elevated levels of ZDDP in it if you are going to run a flat tappet cam. Call them and they'll tell you personally. In a perfect world every engine would use a roller cam, but that's not the case and hence the ZDDP issue.
Originally Posted By: Dyoel182
I've never seen the a 10w30 HDEO as much as they are talked about.
Mobil has it and so does Shell. I'm sure others do as well.
I've never seen the a 10w30 HDEO as much as they are talked about.
Mobil has it and so does Shell. I'm sure others do as well.
Originally Posted By: BrianWC
Diesel oil fits into this equation because diesel oils still had higher levels of zddp. I cannot recall how much that's changed with the new CJ formulations, though.
The newest HDEOs still have high levels of ZDDP-much higher than gasoline API oils.
Diesel oil fits into this equation because diesel oils still had higher levels of zddp. I cannot recall how much that's changed with the new CJ formulations, though.
The newest HDEOs still have high levels of ZDDP-much higher than gasoline API oils.
- Status
Similar threads
- Question