Merc’s Opti-Max oil has “gelling” issues ?

[VH5150]

I have been reading on various Merc forums that there is a rumored gelling issue with Merc DFI oil? Any truth to this?

[JOE54]

we have seen some yes especially on boats that set for extended periods of time

[VH5150]

That's not good! Coming off a Winter lay off. I used DFI last season. Went back to Prem Plus, DFI is just way to much $$$. Any issues with Prem Plus or even switching to Pennzoil?

[EuropeanAM]

That's not good! Coming off a Winter lay off. I used DFI last season. Went back to Prem Plus, DFI is just way to much $$$. Any issues with Prem Plus or even switching to Pennzoil?

They're "suitable" oils, but tend to reduce Direct Injector lifespan.

[Tarponstalker]

Yes. I just had my tank cleaned out due to gelled oil. I think it's coming from tanks that way. It certainly doesn't sit in my boat long. I go through 5-6 gallons a year.
I think with fewer people using Optis these days the bulk oil is sitting longer. Just a thought.
I can't believe they charge $65-$70 per gallon here for Opti/dfi oil
I started using a funnel with a screen when filling my oil tank.

[FrancoCialone]

This is another reason I don't buy DFI oil in bulk even though its cheaper, the BPS in Vaughan sells it by the gallon and bulk, don't use that much so will buy it by the gal. when I need it.

[mikeky]

So is it additives that are gelling? If so, and you filter them out, then?????

[EuropeanAM]

Couldn't give a blanket answer to your question, Mikeky. The two I've seen, it's WATER/MOISTURE.