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31 votes

At what time of day/temperature should I refuel my vehicle?

According to wikpedia, the volumetric constant of thermal expansion for gasoline is av=950*10^-6/K For example, if the temperature changes by 20K (20°C; 36°F), the volume changes by a factor of ...
sweber's user avatar
  • 7,057
17 votes

Initial miles on car

tl dr: No. Over the lifespan of your vehicle, 230 miles is absolutely nothing (especially on Hondas, lol). At most, this starts to get you to the break in point of the engine. You'll still need to ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
11 votes
Accepted

Is tire life by mileage a failure point or wear point?

When shopping for tires, some of them will have a mileage warranty, normally in the range of 40,000-70,000 miles. When a mileage number is listed, it is a pro-rated tread life warranty. When the ...
JPhi1618's user avatar
  • 13.2k
7 votes

At what time of day/temperature should I refuel my vehicle?

Many countries (but notably not US) actually have regulations regarding temperature compensation of fuel volume. For example, UK has Standard temperature accounting for fuel dispensers, which allows ...
Dmitry Grigoryev's user avatar
6 votes

Initial miles on car

I wouldn't worry about it - "new" cars quite often accumulate a few miles pre-delivery. Usually this is the vehicle being moved between lots (as the dealer said) and various movements around storage ...
motosubatsu's user avatar
  • 10.2k
6 votes

Buying an older car. How to decide on the balance between age and mileage?

Maintenance records are key. Look for a large book of receipts, going back as far as possible. Make sure you know what the main maintenance issues are on the car; e.g for Subaru, they need a timing ...
PeteCon's user avatar
  • 8,712
5 votes

Is tire life by mileage a failure point or wear point?

I would assume it's a calculated estimate, based on an "average" wear rate for the compound used - I'd expect that they would run the tyre in controlled conditions for a certain mileage, measure the ...
Nick C's user avatar
  • 28.8k
5 votes
Accepted

WOT uphill, no increase in RPM, consuming more gas?

I would bet the engine in your car is drive-by-wire, which means the computer is controlling the throttle, not you. In doing so, it is going to look at the load put on the engine and a bunch of other ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
5 votes

What is this bar on my dashboard next to gas mileage?

Searching the number under the image leads me to believe this is "Royalty-free stock photo ID: 1465044698 Novosibirsk, Russia – July 09, 2019: Citroen C4, close-up of the dashboard, speedometer and ...
Caius Jard's user avatar
  • 1,145
4 votes

At what time of day/temperature should I refuel my vehicle?

As @sweber said, the tanks are usually underground, which keeps their temperature constant. However, if you are filling a smaller bottle with gasoline (ex: for a small engine), the first few gallons (...
anonymous2's user avatar
  • 5,235
4 votes
Accepted

How can I increased mileage of my Bike

Here are some generic tips for increasing mileage: clean filters: air and fuel filters become restrictive when they get dirty. Clean them or replace them, depending on your engine's design. clean ...
tlhIngan's user avatar
  • 12.2k
4 votes
Accepted

Mayonnaise on tip of dipstick - new car, low miles, well maintained. What to do?

One cause can be head gasket failure as you say, but another cause is continuous short trips where the engine does not get properly hot - the 8 mile city trips can be an example of the type of use to ...
Solar Mike's user avatar
  • 34.6k
4 votes

Are water electrolysis hydrogen generators likely to damage car engines or make them more efficient?

Note that whatever hydrogen you produce will contain energy from the car battery. The car battery is charged by the alternator, which gives you energy obtained from fuel. What you describe aims to be ...
juhist's user avatar
  • 14.6k
3 votes

Is a gas car as sensitive to terrain as an electric?

My answer is - yes, gas engines are affected in the same ways by hills and wind... but that doesn't mean surface streets are the better option. When you look at the question as a raw physics question ...
kyle_engineer's user avatar
3 votes
Accepted

Could a stuck EGR cause better gas mileage?

It depends whether the EGR valve is stuck open or shut. Stuck open would cause drivability issues and decrease MPG. Stuck shut would cause no adverse affected apart from the check engine light (in ...
Newbie Noob's user avatar
  • 2,781
3 votes

Mayonnaise on tip of dipstick - new car, low miles, well maintained. What to do?

It sounds like it isn't being driven enough and there is condensation in the crankcase that isn't being burned off. You should probably follow the recommendations for harsh driving conditions
Mobius's user avatar
  • 1,318
3 votes

Buying an older car. How to decide on the balance between age and mileage?

Well its not a bad thing getting a pre-owned vehicle but some factors are to be kept in mind before spending your cash for the same. Kilometers or miles it ran Parts to be renewed or parts to be ...
BIJAY's user avatar
  • 31
3 votes
Accepted

Is there any good treatment for a speckled / pitted windshield?

There's probably something somebody can do to restore the glass on a windshield to pristine condition, but the cost would be close to a new windshield, if not more. For example, when I bought my first ...
tlhIngan's user avatar
  • 12.2k
3 votes
Accepted

2006 Grand Prix GXP V8 high mileage engine

tl dr: Move along; nothing to see here. 396,000km (246k miles) is a lot of use even for LSx engines. Unless you are getting this for free, I'd pass. There are several reasons for this. Even though ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes

High mileage gap increase or decrease?

The basic answer is, you need to gap it to spec. The reasoning here is the ignition system is designed to run at the spec'd gap. Running it narrower will cause it to get poorer fuel burn and thus ...
Pᴀᴜʟsᴛᴇʀ2's user avatar
3 votes
Accepted

Is it ok to use a low-mileage oil from another car?

The only scenario that I would find this acceptable is your friend hasn't changed the oil in a period that grossly exceeds the recommended change interval. If they can't afford to replace their oil, ...
mikes's user avatar
  • 20k
2 votes
Accepted

How can I tell the approximate real milage of this vehicle?

Its almost Impossible to determine the mileage of a pre digital era vehicle. There is No way you can ascertain that the odo has not been tampered with, for instance the local mechanics in our suburbs ...
Shobin P's user avatar
  • 8,936
2 votes

How much gas does a car use per-mile?

The way to calculate the gallons per mile is as follows: Fill your tank to full and note the mileage Drive till the tank is down to about 1/3 Keep the driving to the kind you would normally do, or ...
cdunn's user avatar
  • 9,296
2 votes

Is my car likely to last longer being driven 40 miles a day at highway speeds or 14 miles a day in stop-and-go traffic?

There is no great answer to this question. This is because you're wondering about the short-term and this is more of a long-term type answer. Even the long-term type answer depends on the area you ...
vini_i's user avatar
  • 16k
2 votes

Initial miles on car

Well, since you already paid for the thing and there's not typically a huge window of time to return it, the answer to your stated question, according to the Serenity Prayer, is to accept with ...
seizethecarp's user avatar
2 votes

Is tire life by mileage a failure point or wear point?

The testing for tires has components in them which I find nefarious and not realistic. I've never had a 60,000 mile tire last the anticipated distances. My driving 'style' is most probably the delta ...
DucatiKiller's user avatar
  • 32.9k
2 votes

High or low octane and mileage?

Multiple tests have shown that fuel octane level has no role in mileage and maintenance. Octane level only says something about detonation resistance, the caloric value (amount of energy) in the fuel ...
MadMarky's user avatar
  • 1,350
2 votes
Accepted

My 2008 Miata only has 3,600 miles on it but failed the smog test

Here's an article explaining a basic generic Drive Cycle Since you'll want to be as efficient as possible, you should follow the procedure provided by the Manufacturer. That procedure is listed below....
NitrusInc's user avatar
  • 763
2 votes
Accepted

Can a car's mileage that's been clocked roll back to its correct mileage?

It is absolutely plausible the mileage would roll back (or, would that be forward?). I've seen news casts of "investigative journalism" where the journalists have looked into whether the odometers can ...
Pᴀᴜʟsᴛᴇʀ2's user avatar

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