shallowater

If the rotary feeds on engine oil, when not just make a RX8 with larger engine oil tank? that way we can just change engine oil every 3000miles and save the trouble of checking it every 2 gas fill-ups...

sounds like a solution? or am i missing something?

CarAndDriver

Checking ever 2 gas fill-ups seems a bit much to me if you're filling up every week. Once a month or every few weeks seems right.

A bigger tank with more oil would mean more weight and more space requirement. Personally, I'd rather have a lighter car with a smaller/lower engine.

Myardor

iTrader: (7)

+1 as above

Razz1

I think it is Mercedes that has the same set up for a new fuel system.

It adds something that needs to be filled up every 5,000 miles.

When its low a light comes on and allows you 500 miles.

shallowater

seriously, how much weight would it put on to have a bigger tank?
2lbs? 10lbs? i can live with that.

JinDesu

iTrader: (2)

You can buy a bigger oil tank, I think. Fluid Motorsports has one, and so does Greddy. It pretty much doubles the oil capacity.

The checking every two fillups is to be safe. I think you can make it at least 2000 miles without topping off if you don't blaze through the RPMs.

CarAndDriver

Every pound counts. You're more than welcome to install a bigger tank.

Hoss

Our oil sump system already holds more oil than you change in an oil change by about three quarts. I think a better solution may be developing a dry sump system to make more efficient use of the fluids in the system, but I dont know much about what that would involve...
Wouldnt once every few weeks equal out to every other fill up if you are filling up every week?

I just check mine every time I fill up, it isnt that big of a deal, I am already out of the car, might as well do something other than standing next to the pump for a few minutes...

CarAndDriver

Yeah I misread, I was thinking every week.

shallowater

it is a totally different story when there is freezing wind outside....

Hoss

Oh, I would never subject myself to that kind of environment... lol.

Silver06

It's for the Diesels. To lower emissions, they add UREA (yep, concentrated ****) to the exhaust. Mercedes' is called BluTec, BMW has the same thing. VW's system is called AddBlue.

It has always surprised me that Mazda has not gone to a separate oil tank. Two stroke outboards and motorbikes even have a separate oil tank, rather than mixing. It would be no problem at all to have a warning come on to give ample time (weeks) to refill the tank.

I think that a lot of problems would have been solved with Renesis failures if an oil that was designed for the purpose was injected into the engine, rather than diluting the whole mess with 5w20.

RedRocket8

^^^^^100% agree

Hidef1080

Between the oil coolers and oil pan, I think we have all the oil we could want to hold with changing it every 3000 miles.
More oil or large capacity would mean more waste.

We need a separate oil tank for the oil being injected into our engines.
In fact there is a mod that does that very thing.

You'll still need to check it and add it as needed.

boosted475

I would go with a bigger tank if possible.. less to worry about and it can't weigh that much more. Not like I'm racing and 100's of a second count

RIWWP

iTrader: (2)

+1,000,000. In RI, they legally can't have any of the pump latches they have in other states, so you have to stand there holding the lever the entire time as well. A pain even in the pleasant summers, a royal *** freezing in January. I don't check when filling up because I can't possibly pump gas and be under the hood at the same time.

But I also consistently burn 1quart every 3,000 miles, so every 1,500 miles, I add half a quart. Hardly need to do it every, or every other, fillup. Unless I got 750 miles to the tank...and I don't


+1,000,000 (so that is 2,000,000 pluses so far) Uninformed Customer hassle from an additional maintenance item would increase a bit, but uninformed customer hassle from engine replacement would drop. Option 2 is a better financial decision.

Hoss

Do what I do, keep something in your car that you can use to prop the handle so it pumps for you

Here, some pumps have the latch, some dont. I just put something under the handle to keep it pumping and go check my oil.

RIWWP

iTrader: (2)

Yeah, when I can, I use my gas cap. Most of the Shells seem to have handle designs that fit the gas cap perfectly, others are more open and there is too much room to hold the handle open.

shallowater

come on, why should any mod be necessary to make life easier for most drivers? good design should be the other way around: if you would like to have a smaller tank and get a few lbs reduction in weight...go mod it! that is the whole point of mod...is it not?

ken-x8

For those in states where they do allow latches, don't go and sit in your car while the gas pumps. But if you do, make sure that when you get out you very specifically ground yourself to discharge static before handling the nozzle. Also have a plan for how you'll respond if the nozzle does not shut off when the tank is full.

Sohn adapter and a separate tank, as Hidef1080 suggests, is the answer to the original question.

Ken

shallowater

^^^^this!

RIWWP

iTrader: (2)

Agreed. When you don't have to stand there holding bare metal outside in -10 degree temps (or worse if you talk to the brothers farther north than I), there are a host of problems available, including the static spark fires, pump shut-off failure, tank overflow, driving away with the hose still connected to the car, etc... From those points of view, I get arguement for why the latches shouldn't be on, but at the same time, drivers need to pay as much attention to every facet of driving anyway. Too bad they don't.

Jethro Tull

iTrader: (6)

Checking your oil once in a while is such a basic thing- for any car- also it's so easy that I'm having a hard time sympathizing with anyone who considers it a pain.

Just do it and get over it.

shallowater

i don't think too many people would carry around a bottle of engine oil like us 8-owners do. I agree that you SHOULD check engine oil once in a while, but honestly, the fact is that I seldom (in fact, never as I recall) see anyone checking engine oil level at gas station...let's face it: it is probably not a big deal, but it is still a hassle that is uncommon to owners of other cars.

Hoss

I bet the owners of other cars check their oil whenever the add oil dummy light comes on.

If it is such a hassle to remember to look at a dipstick twice a month, wait for your light to come on and add oil.