Recent content by johnmyster

Me wondering if it will eventually extend to ATF as it did spring-2025.

We all know you're above average with your comfort level of unsupported assumptions. The truck doesn't have an oil temp sender. On similar trucks that I've owned with oil temp, 230 under similar conditions (actually the same route with similar gross weight) 230 was not a safe guess. I'm well...

But the whole "puck in the heater core circuit to assist trans warming" is irrelevant to the OP (his is in the radiator cold tank) and was acknowledged explicitly in post #8. So really this is an argument about nothing. Perfect for BITOG. On my current truck, the oil-air trans cooler is in the...

FCA didn't back-spec the restriction on 15w-40. The 2019 owners manual said 10w-30 or 5w-40 when the truck was sold, new. It wasn't some scientific process that later led them to exclude 15w-40. The TSB cites deposits. To which I point the finger back at FCA for their silly 15k interval...

It's almost like you had some arbitrary notion of a 20 weight falling apart at high temperature, and then later stipulated some self-defined viscosity/HTHS threshold that isn't met. I don't think any of us would've expected a 20 weight to not be thinner than a 40 at high temperature. I...

But it is still the cold tank, and engine coolant can't get there without crossing the tubes. If the thermostat is partially open and the vehicle is moving, the cold tank is closer to ambient than than thermostat setpoint...up to the point the radiator is saturated and the thermostat is full...

My Toyota isnt an external puck for the transmission. (It does have a puck heat exchanger for oil.). Like the OP, it’s in the cold end (bottom) of the radiator.

Cat EC-1 has long been less than cutting edge. Volvo VCS-2 sounds like Peak Final Charge Pro. https://www.owi.com/binaries/content/assets/documents/trade-show-documents/hdaw-2023/peak-hd-afc-brochure.pdf

It's almost like when you remove the small numbers the average of the remaining numbers goes up. Law of averages? Survivor bias?

What you call "data" I call marketing claims. We all know useful lube life is 1) subjective and 2) dependent on driving style. Both of these are ignored by your "data," which makes them seem like heavy generalizations, because they are. But if it fits your gas vs diesel worldview, cling to...

My toyota and truck both have factory, dual coolers. Keep in mind the radiator heat exchanger is in the cold end of the radiator, sitting in water that is generally around or slightly above t-ambient (far below engine coolant temperature) unless the radiator is saturated, at which point the...

This only means that the rate of oil consumption is roughly equal (within measurement ability) to the rate of fuel dilution. The magnitude of either cannot be known from the dipstick. The amount of oil I've seen in the 6.7 CCV system is non-trivial. Two percent is roughly a cup in a 14 quart...

Sigh.

Yeah, someday I'll figure out what my time is worth and change my values. Meanwhile, I'm set for 2+ years on all three vehicles with bargain oil ahead of oil-gate 2026.

July 12th: 2009 Toyota Venza U660e Transmission @ 101k miles - 2.5 qts ATF out. 2.5 qts Valvoline FullSyn "Hybrid" ATF in. ($1.45/qt AAP clearance fodder.) Annoying how little fluid comes out of this unit. Only prior service on this unit was 15k ago: spill and fill with Toyota WS. 2014 Ram...