Main Question or Discussion Point
Lift the bonnet on a modern car and you see a nightmare tangle of pipes and wires, so if your car will not start would you know how to fix it?
So many of the systems on modern cars are run by imbedded computers, there's no way I would even try.
I think some cars are smarter than the people that drive them these days.So many of the systems on modern cars are run by imbedded computers, there's no way I would even try.
I grew up with seven brothers, all but two of them were very good with auto mechanics. I learned from them how to do simple things. I wasn't too bad at it, but if the car's newer than, oh, 1966, forget about it!
I think you'd have to totally redesign the engine to something else to get above 60mpg with petrol, any inventors out there? As far as I understand it, which isn't much admittedly, these days most of the technology is not for increasing MPG necessarily, in fact things like air conditioning decrease it a great deal. Hybrids do better though.
I would work on early fuel injection systems, except for the computer. I had a timing light and I used to time the engine to optimize fuel efficiency. I've worked on my Honda's where I've had to change out components like wires, plugs, distributor, alternator, cooling pump (Prelude - that was a nightmare because the part of the pump sites behind the timing belt cowling ), brakes (cylinders and pads), . . . .I used to be able to fix a whole lot of stuff on cars, until they got loaded with sensors, computers, etc. Rebuild/rejet carbs, etc, etc. Now I'm pretty much limited to troubleshooting simple electrical problems with my multimeter, changing fluids, changing air/oil/fuel filters, replacing belts and hoses and similar stuff.
Really, I did change that to petrol, to be clear. But that is still pretty impressive.Blue motion VW polo diesel gets 70 mpg.
The most efficient car in the pipeline is a diesel hybrid.Several companies work on that Opel / Vauxhall has an Astra with that configuration doing 59 mpg. Peugeot with a 308 model. but my Peugeot 207 1.6 HDi is hardly any less than that (52 mpg) if I dont insist on driving faster than 80 mph. If I drive a steady 55 mph it's about 78 mpg, that would be pretty much approaching the minimum limit. You can conserve energy by electric breaking and by running the combustion engine on most efficient rpm, having the electric engine doing the variation but there is nothing you can do about the loss due to drag. For 100mpg you'd need something different.
There was an old joke about JC Whitney because they sold LOTS of parts that claimed to dramatically improve your gas mileage. It went something like "I'm getting such better mileage that now I have to stop every 50 miles or so to drain the fuel tank."
Or a Haynes for most home repairs. It's cheaper and includes more things than I'm qualified to do the way it is.It's called a Chilton's manual.