![]() ![]() If you ever go on a long trip and have a couple extra minutes try driving at 55mph instead of 70 and see what happens. I'd imagine that taller gearing alone would show an increase of 5mpg on the highway. Unfortunately, these are pretty expensive things to change, and believe me if I could will my car to grow a 6th gear, it'd have 7 bynow. Aside from that, it's mazda's overly-rich tuning which is what gives our cars such excellent longevity that REALLY shoots you in the foot (or wallette) when it comes to the pumps. Prettymuch there's 2 main factors "sporty" low gearing which prettymuch every manufacturer uses anymore due to "perception of power" how people will judge a car's power by "being able to pull that hill at the speedlimit in 5th". Again, that kind of thing essentially increses engine efficiency, so it CAN, under similar conditions produce better results (again this all depends on your right foot) Exhaust didn't really show any noteworthy increase or decreas in mileage (even after I got over the thrill of revving it all the time to hear it growl) I've seen a couplefew posts of guys who've done some internal mods as well as camwork and reported increased economy. I tried to be as scientific as possible when adding my intake, mostly notice it on the freeway, and the difference is minimal but I'd say 1-2mpg increase. You can easily break it, so approach with caution.ANY engine mod essentially increases efficiency, however when you've got that extra ability, you generally use it, so in the end, you really don't gain anything. Note, the Diesel pump bolt is a left-hand thread that is unmarked and does not use any washers. Do not over-drain as this may require you to re-prime the oil pump a second time and restart the entire process. Do not drive the vehicle with this much oil as it will damage seals and other components. Use the dipstick as a guide and use a measuring container to count the liters of oil that have drained off, as a backup reading. It is extremely important to drain the excess oil to the correct level. Only attempt this if you have allows the engine oil of the 3.2 diesel engine to drain for longer than 10 minutes. This is an emergency procedure and not the normal oil changing process. Always use the best synthetic oil for your vehicle to ensure maximum protection from a cold start. PLEASE NOTE: this isa risky procedure so attempt at your own risk! Important:Īlways ensure you use the same grade of oil and avoid mixing oils. Remove the oil cap to ensure oil is flowing overthe hydraulic lifters.Check that the oil pressure light is off (allow5 seconds).Close the sump screw with a new sump washer.Leave the oil cap off and observe the oilpushing up over the hydraulic lifters.Crank the engine in short 10-second intervals.Watch the oil filter housing for any oil pushingthrough – this is an indicator that the oil pump is full and primed.Low air pressure is enough since you simply wantto induce a bit of pressure to push oil into the oil pickup tube.(Highpressure can damage or unsettle any seals) Do not exceed 0.6 bar of pressure if possible.Start pressurizing the system by forcing airthrough the breather pipe slowly.Get an assistant to watch the open oil filterhousing for oil coming through.You can seal the oil dipstick if you wish, butnot 100% necessary.Seal the air hose to the breather pipe securely.After 24 hours connect a portable compressor tothe breather pipe situated on top of the engine.Allow the engine to stand for a full day of 24Hours.Fill up the engine with 15 (Fifteen) liters ofoil.Place an oil catchment bucket below the engine.Disconnect the battery to prevent you fromstarting the engine. ![]()
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