Mazda's come factory filled with Motorcraft 5w20 syn blend. I would use MC, or castrol gtx. extended drains i would use M1.
Mazda 6 3.0 V6 oil recommendation
- Thread starter carguy996
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Ours is an '04 Mazda6 wagon with the Duratec V6. The factory fill is indeed Motorcraft 5W-20. I am not Eric, but I can assure you that the filter is not easy to reach with a strap wrench. That is one reason we are using the K&N oil filter with the handy nut on top; the other is that the K&N has a high flow and therefore is less likely to have to go into bypass mode at high revs.
FWIW, a couple thousand miles back, we "upgraded" to GC (German Castrol, made by elves: there is an entire forum on this board about it), a 0w30 oil, and have seen no discernible decrease in gas mileage.
Use regular oil and monitor consumption. After you can make 5000 miles without adding oil between OC, switch to synthetic.
(Or 4000 miles.)
There's not a lot of room to get the wrench in there, but it's doable. Like i said get the K&N filter, and you won't have to worry about that anymore. The Mobil 1 filter is good also, but the nut on the K&N is much easier to work with. The other thing you should do is cover the exhaust manifold (located under the filter) with foil, because when you remove the filter, oil will spill all over the place if your not careful.
Carguy, remember to check your oil level weekly, because there have been documented problems with the PCV valve on this car.
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