I’ve noticed Honda puts an emphasis on reducing stress. I have a 20 year old Honda which still runs fine because everything about it seems “overbuilt” - other owners say it runs fine without coolant, oil, etc - just keeps plugging along.
This was when there was a lot of grousing about those cheap (and fuel efficient!) Japanese cars catching on in the U.S. market.
Hilariously, the Japanese car just kept running and they had to intervene — maybe drain the radiator?
I wish I could find something about it but even ChatGPT comes up empty handed. Maybe it was a half-time stunt? I feel like it was in a stadium anyway.
(My first car was a used 1974 Datsun B210.)
This is called lying. They are lying.
I can't be driven on the street in any meaningful way anywhere but a Minnesota winter.
If you can't drive to work 20 miles away in 75 degree weather without coolant, than no a car can't run without coolant.
And no it can't run without oil in any meaningful way on the street for more than maybe 15 minutes.. so again, no Honda Toyotas are no built so well that they run without oil.
But yeah, you can limp along without the essential fluids for a bit.
Um, no. Go ahead dump your oil and coolant, go drive your car, and report back how "fine" it did.
(No, please don't actually do this. Although here's a guy who did, for the clicks. The Honda did impressively well, but it wasn't "fine". https://www.youtube.com/watch?v=zyejT4VPzlE)
Oil not so much.
The longest I've seen a used car go without an oil change was 40k miles and it was changed when it started making noise instantly on startup. That was basically 90k to 130k. Sure 0 to 40k would go a bit better.. but not 15 years of typical driving.
Between carbon blowby, gasoline dilution, oil burning at the rings/cylinder walls even if minimal, no car is making it 15 years if the person drives more than 5k miles a year IMO.
1) cars have oil
2) said oil should be changed regularly
Similar to how this person went most of a lifetime without noticing and wondering what oil change businesses, advertisements, coupons, etc were for... They also didn't notice someone in their household or a service provider of some kind (brakes, tires, idk) changing their oil.
Rate of heat transfer in general if probably more important.
There are various figures of merit, such as the Mouromtseff number https://doi.org/10.1109/JRPROC.1942.234654 or https://www.electronics-cooling.com/2006/05/comparing-heat-t... for a quick overview.
Some tables of heat transfer coefficients: https://www.engineersedge.com/heat_transfer/convective_heat_...
But, turns out water is just very very good also when you take these other factors into account. Compared to oil, it has, as mentioned, much higher specific heat, it has higher heat conductivity, it has lower viscosity which means less pumping power and more likely to see turbulent flow which helps with mixing.