Linked Questions

21
votes
7answers
304k views

Is idling bad for your engine?

If I sit in my car for 30-40 minutes with the AC and the car idling, does that "hurt" the engine, or does it simply waste gas and pollute the air? Would it be better if I turned off the car? A ...
34
votes
1answer
6k views

Why is my car equipped with a battery shutdown timer?

I currently live in Japan where I bought a 1997 Subaru Impreza WRX STi. Since I don't completely speak Japanese, I wasn't able to ask anybody correctly about one thing that the previous owner had ...
13
votes
6answers
4k views

How to deal with a hot turbocharger

A piece of advice that seems to be widely accepted is that after a long high-speed run, when the turbocharger is thoroughly hot, you should let the engine idle for a while before stopping it. The ...
8
votes
4answers
12k views

Do fast cars need to occasionally be driven fast?

In the broad spectrum of cars, there's higher end models with sport-focused engines. Examples would be an BMW M3, and even more so Ferraris and Koenigseggs etc. Apparently they're more fussy, in that ...
8
votes
6answers
11k views

Is the 16,000 km oil change interval for the 2016 Corolla correct?

I recently bought a 2016 Toyota Corolla and the service schedule the dealer has provided has the first oil change at 16,000 km. Given that I did oil changes on my previous vehicle at 5,000 km, I find ...
7
votes
4answers
2k views

What do the terms “combined port” & “direct injection” mean?

I heard these terms recently as part of the description of a new car. I know that there are intake and exhaust valves in the engine that are controlled by cams on the camshaft (if that helps you ...
5
votes
3answers
6k views

Is it bad to idle the car for 5 min or restarting the car?

I know idling the car wastes gas but which is worse, idling for 5 min while I talk to my friend or turning the car off, talk for 5 min, and then restarting again? This can also be applied to idling ...
3
votes
2answers
2k views

Why are intake valves dirtier than exhaust?

I took my engine apart and one of the things I noticed, on both cylinder heads of my Tacoma V6, is that the intake valves (picture right) are significantly darker (or dirtier) than the exhaust ones (...
3
votes
2answers
744 views

Is Stabil ethanol treatment a suitable alternative to ethanol-free gas?

I'm not a fan of the E10 ethanol-blended fuel (10% ethanol/90% gasoline) that is extremely common here in the US. I'm no expert, but I've heard and read that it is often damaging when used in either ...
2
votes
3answers
682 views

Will dislodging carbon deposits harm the catalytic converter?

If I use an intake valve cleaner that dislodges chunks of carbon from the intake valves or piston head, and they flow through to the exhaust, could they harm the catalytic converter? I'm interested ...
4
votes
2answers
202 views

Radically different car maintenance schedules in manual and service instruction sheet

I own a 2013 Fiesta Ecoboost 1.0L 74kW, and noticed that the maintenance instructions in the US version of the owners manual are very different from the service schedule available on Ford Etis. (EU ...
1
vote
1answer
114 views

Would ethanol-free gasoline avoid damage related to low usage?

My Mom recently got a brand new Tacoma and the dealer told her that she might want to consider Ethanol-free gas as it would prevent the engine from becoming "jacked up" (damaged) if not driven for a ...
1
vote
1answer
38 views

Effect of ethanol added petrol on vintage cast iron engine bikes

I own a 1993 Royal Enfield Bullet 350 Classic. Recently my city switched to 10% ethanol added petrol from the earlier used pure petrol. I very rarely use the bike; approximately one time in every two ...