randyrx8

I can't see anything close to that, I drive all highway every day.

I am logging dynamic plots of the Air flow which is proportional to fuel flow, that I am using to generate data on how to improve mileage. I have seen speed play a very big role, I still need more driving data but at 60 MPH I see mileage of 18, at 100 MPH it is
7.9, In 6th gear, I wouldnt have expected such a difference.

RX8 XTC

In my Rx8 I use 1 quart or more every 500 M !!!!!! i dont think this is HELTHY as i was Talking of my 8 An its thing with breaking down on ME

RX8zoomDW

You CAN get a good look at a tbone.....
by sticking your head up a bull's @$$, but why not just take the butcher's word for it?

Besides, use it as excuse to lift a 7lb hood to reveal the renesis frequently

Katchoo

Something is wrong there...you should take that puppy back to your dealer.

6speed8

I drive 60-70 miles a day, and check my oil every 1500-2000 miles. At first I check it every 2 or 3 days, but then I found out I can go 2000-2400 miles before it will take a quart. I get the oil changed at 3000-3500-- miles and use castrol GTX 5-20.

I, Claudius

I bought a case of Exxon Superflo 5W-20 the same week I got the car, and have used a little less than two quarts in 2800 miles. It meets all of Mazda's specifications, looks and feels like oil, and the price was right. Plus it comes in a nice plastic bottle with a threaded cap and a clear stripe down the side, so I can use part of a quart and put the bottle away in the trunk with no mess. A lot of people say they use Castrol. Is Castrol significantly better? Just curious.

Enzolor

No clue what oil the dealer used in my 8. Any harm in mixing brands?

By the way, car rocks!

6speed8

I bring my own oil (castrol 5-20) to the dealer so I know what they are putting in it, the filter and labor come out to $14.00.

Gord96BRG

Airflow, as in road speed? Speed is NOT proportional to fuel flow - the aerodynamic drag (as a result of speed) increases with the square of speed. So, if it takes 10 hp to overcome aero drag at 50 mph (and rolling resistance would require another 15 or so hp), then at 100 mph (double the speed), it takes 10*10 = 100 hp to overcome aero drag at 100 mph! (For the rolling resistance, it's proportional to speed - the 15 hp at 50 mph becomes 30 hp at 100 mph).

Fuel flow is roughly proportional to the power produced by the engine.

Regards,
Gordon

randyrx8

No

Air flow as in Air intake flow into the engine. It is held in constant ratio to fuel, with a bias from the O2 sensor, which is in the equation as well.