harryh

You don't say what model of car. Some Mechanics may also suggest some liquids like Taco15 syncro mesh fluid to neutralize that tiny grind in ur tranny. Changing the transmission fluid might help but I doubt it. The transmission housing may be probably cracked. Usually, this will misalign the gear shafts and cause grinding between gears.It don't require a new transmission - just the syncro to be replaced. Which depending on how old and how many miles are on your Mazda car you might just want to have it rebuilt or a new tranny installed since the tranny has to be disassembled anyhow. Unless you're expert at rebuilding manual trannies, I suggest you have it done by a specialist professional. It's not diffucult to fix, but it's also easy to mess up if you don't know what you're doing.The synchromesh is what helps the gears to engage smoothly without grinding when you depress the clutch pedal.

Ordinarily, the best way to keep a fuel tank clean is by using a bottle of fuel stabilizer/liquid as suggested by Majeed. However, you may alternatively do a thorugh cleaning job by following the steps as detailed below a.Consult your vehicle's manual to understand how each part connects to the tank and how the gas tank should be removed. b.Make sure there is little to no gas in the car. Drive your car to burn any remaining gas, if necessary. c.Remove the tank, based on the instructions in the car's manual. Make sure that your tank is empty. d.Fill the tank with fuel tank cleaner, following the instructions on the bottle. In some cases, you will need to dilute the cleaner with 1 or 2 gallons of water. Different cars also take different amounts, so refer to the Fuel Tank Cleaner bottle's instructions for guidance. e.Let the cleaner sit for several hours to allow the solution to work on and loosen grime, rust and other deposits attached to the walls of the gas tank. f.Clean the tank out with water from a garden hose. Clean the outside of the tank as well. g.Repeat the first few steps until nothing comes out of the tank. Rinse the tank a few extra times to be sure that it’s completely clean. h.Allow the tank to dry for 24 to 48 hours; be sure your tank is completely dry before reinstalling it. The tank must be completely empty and dry before it is put back on the car.

After cleaning the car air filter, you can reuse it. You do have to clean your car air filter to get better mileage on your car. You can clean the air filter yourself by reading up on the Internet or by checking up on the owner’s manual. But this is allowed only by a few brands. Disposable air filters are really cheap. Most service centers will replace your used filter with a disposable one. Another option is to remove the air filter and blow out the extra dirt without bending the pleats of the filter. This will last you longer, but you eventually will have to replace the filter. A better eco-friendly option is to get washable and reusable filters from companies like K & N. The only problem here is that these will cost slightly more, but they will last you a longer time. You have to check these filters every 50,000 miles, and then give them a good cleaning with stock kits that the company will supply.

One point of view is that Shifting in and out to Neutral at every juncture shocks not only the transmission, but the u-joints in your driveshaft, or your CV joints, and differentials, and other important bits. From a purely technical standpoint, if you've got it in gear and coasting, the engine is running at a higher rate than if you'd had it in neutral. However, whether this means more gas consumption or not is, mostly, moot - two of the inputs that determine fuel delivery are engine speed and vaccum, and those at such low levels, likely balance each other out. At Neutral is a different story. The vehicle is not spinning the engine; there's no vacuum increase. In neutral, the engine can produce only so much work as is required to keep itself running. In drive, the engine also needs to spin the torque converter and the transmission pump. *slightly* more work=slightly more fuel use. Another advantage of putting it in neutral at (especially long) stop lights is that you don't have to put your brakes on as hard. This in theory leads to less heat warpage.