Agree on the Optilube. My brother commented how quiet my engine sounded compared to his, same 3500s. I run a mixture of their products though, xpd, xl, and boost.

 

Seems like overkill... I thought "XPD" was the optimum "mixture" of all their products, lol. I'm just glad to find something that works, with some scientific backing for a change. Best of luck with your ride F-1.

 

Don't really need much antigel in the south so I choose to add more lubricity and cetane than what just running xpd would.

 

What's the shelf life of opti-lube? I don't drive my truck on a daily basis, as I only have driven only 9000K miles since I bought it Dec. 2019. I also don't store DEF as the shelf life is short.

 

Not sure, but 10,000 miles is plenty of driving to keep your fuel from deteriorating. They've got a site, and a number... Give 'em a call.

 

Thanks for the info! Mine should be here Tuesday. I went with the 100, should be all I'll ever need for my stock truck.

 

Optilube is my go to for additive. I use XPD in the winter, and Summer in the warmer months.

Now, the biggest issue is availability in Canada.

 

Fass doesn’t sell the 165 for the GM Duramax anymore without a draw a straw included. To my knowledge that is anyway. As to the Optilube results i can attest to that. I run the XPD in winter and the summer blend yellow label stuff in the summer.

 

My purchase was just a couple of months ago, and i can tell you they do, in fact, sell them without a draw straw... It's an extra $85 for the straw kit, and the two shops I worked with said it "may, or may not solve the problem". That's why I spent the extra cash to downsize the pump ($300), which solved the issue, and works/sounds like it should. It's worth noting, I went to about 3 different diesel shops inquiring about getting that straw kit installed, (which involves dropping the tank, of course), and not surprisingly... No takers.

 

The 11-14 kits don't come with the straw. The 15-16 kits do, for both the 100 and 165, as well as the older 95.

You can either drop the tank or pull the bed. I prefer pulling the bed as I find it's easier. That's how I did mine.

A sump is another option. I opted to use the draw straw instead since I wasn't too fond of cutting a big hole in the bottom of the tank.

 

The 11-14 kits don't come with the straw. The 15-16 kits do, for both the 100 and 165, as well as the older 95.

You can either drop the tank or pull the bed. I prefer pulling the bed as I find it's easier. That's how I did mine.

A sump is another option. I opted to use the draw straw instead since I wasn't too fond of cutting a big hole in the bottom of the tank.

That’s interesting because there is no difference between the model years in that respect unless they made some changes to the unit in the tank.

My purchase was just a couple of months ago, and i can tell you they do, in fact, sell them without a draw straw... It's an extra $85 for the straw kit, and the two shops I worked with said it "may, or may not solve the problem". That's why I spent the extra cash to downsize the pump ($300), which solved the issue, and works/sounds like it should. It's worth noting, I went to about 3 different diesel shops inquiring about getting that straw kit installed, (which involves dropping the tank, of course), and not surprisingly... No takers.

I wonder why the shops refuse to install the straw kits. They aren’t that bad to do. As long as your happy is what matters.

 

I've got a 2011, that explains it. Doesn't make sense... But explains it. At least GM was smart enough to put lift pumps in the latest model year, like every other truck has been doing for decades. I feel like either way I went, (sump/straw/pump exchange) I was gonna spend a similar amount of money. So it just made sense to lower the amount of fuel being circulated, than trying to increase flow capacity for fuel that wasn't being used anyway. changing out the pump was the easiest way to go: $100 labor, 1.5 hours of work.