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12
votes
4answers
2k views

Is downshifting on hills harmful for non-trucks? [duplicate]

Possible Duplicate: Does Downshifting (Engine Braking) Cause Extra Wear and Tear? Since the days of taking drivers ed (many years back). I was told that when you encounter a steep or ...
10
votes
4answers
14k views

Is it possible to harm your car by giving someone a boost?

This post explains why it's a potential hazard to clip to the negative post on the dead battery when giving a boost. But I've also been told that I could damage the electronics in my own car if I give ...
7
votes
2answers
217 views

What factors affect the maximum air pressure that should be put in a vehicle's tires?

For just about every car, there's at least two different "maximum tire pressure" ratings. The vehicle manufacturer's rating. This is usually found on a sticker attached to the driver's door. The ...
6
votes
3answers
368 views

Car enthusiast beginner kit

What is a good place to begin building a kit/set up for performing your own service? For ex: oil changes waxing detailing What is the best starting equipment one can start on?
5
votes
4answers
721 views

If my brakes overheat, do they need to be replaced?

Let's say I take my car track racing, and during it, the hard braking leads my brakes to massively losing stopping power due to them overheating (a likely outcome on stock brakes). Or likewise, I take ...
5
votes
2answers
484 views

How do you set side mirrors?

In a passenger car with 3 mirrors (rear-view and 2 side mirrors), how do you set your side mirrors so as to see as much as possible?
5
votes
2answers
1k views

Muffler off car. Safe to drive with exhaust open underneath?

So leaving work yesterday I heard a clang! - the muffler simply fell off. Further inspection revealed a lot of rust in one particular area on the pipe. Thankfully the forward muffler is still intact ...
5
votes
2answers
3k views

Differences and Recommendation between Steel and Alloy Wheels for Winter?

There are many discussions regarding steel vs. alloy wheels in Winter on multiple forums. It would be good if someone could lay out full facts and help scale these differences (questions below). For ...
4
votes
3answers
101 views

Is it safe to dig a trench under a car to work on it?

Assuming that pushing, towing, and jacking are all out of the question—how safe is it to dig a trench under a car that's stuck on a lawn to gain access to change out a part? Are there risks of sliding ...
4
votes
1answer
45 views

Euro NCAP rating during time

Does the rating scale change in time? I mean if X stars from for example 2000 are less safe car than X stars from 2013? I am mostly interested in adult safety within frontal (and side) impact and the ...
4
votes
1answer
36 views

When should you replace plastic constructed ramps?

Is there a recommendation on how often you should replace plastic ramps? If the ramps look visibly damaged or warped it would make sense to buy a new pair, but I'm curious if the structural integrity ...
3
votes
4answers
3k views

2011 Mazda3 airbag disabled for light passenger

I recently bought a new 2011 Mazda3. Everything about it has been great so far, except one glaring detail. When my 87 pound girlfriend rides in the passenger seat, the "pass airbag off" light comes ...
3
votes
3answers
107 views

Automobile EDR / Black Box - What is it for?

My partner has just started driving, and her insurance company have fitted a "Black Box" to her car. My understanding of these devices is somewhat vague, as some sites suggest that they only collect ...
3
votes
2answers
203 views

Good resource for 3rd-row seating safety?

Does anyone know of a good resource to see safety stats/specs on 3rd-row seating? In other words, I know safecar has stats on front and side impact ratings, etc, but I've yet to see a site that ...
3
votes
1answer
91 views

Help deciphering the penny test

My tires are starting to burn out at nearly the drop of a hat, so it's time to start looking at tire wear. I've never had to replace tires due to wear before, so this is foreign territory for me. ...
2
votes
3answers
619 views

What's happening when you give someone a boost?

While I've given and received boosts before I've always been following instructions by rote and never really understood what's happening. The procedure I've been told is: Attach red clamp to the ...
2
votes
1answer
94 views

which 3m filter for painting?

I am repainting a door using spray cans. I am planing on giong through about 6 can... 1 primer, 2 paint, and 3 clear coat. I have a 3m respirator that I plan on wearing but which filters should I ...
2
votes
1answer
113 views

Crash survival data for old cars

Where can I find a large amount of data on crashes that have happened to answer the question Which old cars (specific models and years) are you most likely to survive a crash in? Obviously you would ...
1
vote
2answers
141 views

Should I replace the tires earlier?

I recently read from a reputable source that tyres should be replaced at 3.2mm of tread thickness, not 1.6mm as the previous dogma suggested. My tyres are all in the 2.0mm - 2.5mm range. I understand ...
1
vote
2answers
60 views

Hyundai Elantra 1998 Child Restraint Anchors

Just wondering if anyone has had experience fitting child restraint anchors to a Hyundai Lantra 1998 (or similar)? I've located the holes for where the anchors should go (according to the manual) but ...
0
votes
1answer
72 views

What essential preparations should I take before winter driving?

Two years ago I published this blog post on being prepared for the winter, covering off: Practice Planning the route Mechanical Supplies Geek essentials Some of these might be a bit tongue in ...
-3
votes
3answers
116 views

Which color headlight is the safest?

Ever since I upgraded to projector headlights I have been using 5000k xenon bulbs. The bulbs I am using are mediocre eBay bulbs and I have been giving some thought to nicer Philips or Morimoto bulbs. ...