Volvo Penta DP-S 75w90 GL-5 gear oil question

[homelite]

I have a 2000 DP-S. Book says use VP gear oil (of course). If not available, use Mobile 1 synthetic 75w90 GL-5. Is it safe to assume that's all the VP oil is at double the price?? I just want to know from a tech who services these drives. I am an auto tech. We have Pennzoil oil of the same spec as the Mobile I just mentioned. I can buy this in bulk at bulk prices and I have it within an arms reach of my work bay. From what I read in the VP manual, the Pennzoil is the same oil. Can anyone that is qualified and really knows give me an honest answer? Thanks in advance!

 

[bruceb58]

Re: Volvo Penta DP-S 75w90 GL-5 gear oil question

If its GL-5 synthetic it will be fine. I use the Mobil 1 in mine.

 

[Don S]

Re: Volvo Penta DP-S 75w90 GL-5 gear oil question

GL5 stands for Gear Lube grade 5 which is a 75/90. You can get it 2 ways synthetic or mineral.
Volvo says use GL5 Synthetic. They also sell their lable of GL5 Synthetic.

 

[the rebel]

Re: Volvo Penta DP-S 75w90 GL-5 gear oil question

Is there any real reason to use synthetic over mineral? they both have the same lubricating specs. Just curious. Thanks

 

[the rebel]

Re: Volvo Penta DP-S 75w90 GL-5 gear oil question

Anyone have a good explanation why you must run synthetic in the Volvo drives? What is the main difference between the two types of GL-5 lube, other than one is syn and one is petroleum based? Curiosity killing me....