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View Full Version : Pennzoil 15W40 High Temp v. Marine?


Archimedes
08-21-2006, 11:03 AM
I've been looking around for the recommended Pennzoil 15W40 marine oil with no luck and finally came across some Pennzoil 15W40 at OSH yesterday that had the right API ratings, but it didn't say Marine on it. It said 'Maximum Diesel Protection' and High Temp, etc. The back said for Gas and Diesel motors operating in extreme environments. Is this the same oil as the Marine oil everyone refers to? I assume it's the same stuff, just in different packaging.

Andyg
08-21-2006, 11:23 AM
I compared the two oils on Pennzoil's website and the 15W40 "Diesel" oil is not rated the same as the 15W40 Marine oil.

Here are the links to the data sheets. The 15W40 Diesel is rated CF/SL and the 15W40 Marine is rated CF/SJ.

Marine (http://www.pzlqs.com/Tech/Pdsheet/DomesticMarketing/EngineOils/pdf/PennzoilMarineMotorOil.PDF)

Heavy Duty (http://www.sopus-staging.com/staging/longlife/site/LongLife.pdf)

bigmac
08-21-2006, 11:38 AM
Indmar recommends oil with API specs CH-4/SJ for your engine. Both of the oils you mention meet or exceed those specs. You'd be fine using either.

The "SL" automotive classification includes all classifications that come before it, including "SJ". Likewise the current diesel classification is CI-4, which includes CH-4.

Archimedes
08-21-2006, 12:11 PM
I compared the two oils on Pennzoil's website and the 15W40 "Diesel" oil is not rated the same as the 15W40 Marine oil.

Here are the links to the data sheets. The 15W40 Diesel is rated CF/SL and the 15W40 Marine is rated CF/SJ.

Marine (http://www.pzlqs.com/Tech/Pdsheet/DomesticMarketing/EngineOils/pdf/PennzoilMarineMotorOil.PDF)

Heavy Duty (http://www.sopus-staging.com/staging/longlife/site/LongLife.pdf)

Well the oil I bought says on the back that it is rated CF/SJ and it has the CH4 designation as well. If it's a different oil than the Marine oil, I'm not gonna use it, because I don't want to mix oils. I'm just looking to have oil on hand to top off between dealer servicings.

bigmac
08-21-2006, 12:54 PM
Well the oil I bought says on the back that it is rated CF/SJ and it has the CH4 designation as well. If it's a different oil than the Marine oil, I'm not gonna use it, because I don't want to mix oils. I'm just looking to have oil on hand to top off between dealer servicings.Why? What's wrong with mixing oils?

Archimedes
08-21-2006, 01:00 PM
Why? What's wrong with mixing oils?

I always thought it was a no-no. No?

bigmac
08-21-2006, 01:02 PM
I always thought it was a no-no. No?

No.

The Penzoil 15w40 CI-4/SL oil will be just fine and it won't matter how it's labeled - Marine or Diesel.