So. Just bc YOU service the ambulances way past they are supposed to be doesn’t mean you’re correct. Ambulances fall under extreme, just as every other super duty on the road which means 5,000 miles. Ambulances with all of the unnecessary idling, which is very bad for these engines as well as the DPF. Also oil analysis doesn’t tell the full story of an oil. You should be changing oil sooner than 5,000 with an ambulance. Should be 3,500.
My boss puts Phillips 66 with titanium 10w-30 in everything. I'm just following orders. The trucks are worked hard too and we have not had any oil related issues even though we are in the desert.
My fuel dilution has been random. Not sure what causes it to be higher certain times. Never really been high enough for concern. I can see where that's different in ambulance service.
Phillips 66 is who makes and bottles the motorcraft oil.
Do their ambulances have the high idle installed?
The ones we saw in dealer the most is the ones who did not work them, they bought it to look cool which is not smart. DPF would be completely clogged up from idling, oil was diluted with diesel. Had to be towed in bc the truck wouldn’t start. This was happening a lot at Nissan too with the XD 5.0.
You don’t want old oil sitting in my opinion for a year. The contents in the oil like acid, soot, and etc why would you want that to sit in the engine and possibly eat away at seals.
The fuel dilution is going to happen regardless. With the 40 weight oil there is a better buffer when it shears from the fuel. The 30 weight may shear to a day 20 weight, vs the 40 weight may shear to a 30 weight.
No, if records are requested, you will have to provide. Some brands will sometimes ask for additional info on service history before moving forward on certain engine-related claims now.
