S4 is 16.6 gal, s5 is 18.6 gal.



A fraction of an ounce isnt enough to worry about. Id just dump in 14 oz, and then fill up.

[quote name='ZenRXSeven' date='Apr 18 2005, 07:35 PM']I've got this nifty plastic tube with a fiting that screws onto your generic-sized plastic bottle. It has a valve on it that you twist to open or close it, so it's easy to control how much oil you're dumping in. I think I got it at an advanced auto, or maybe even wal-mart. Anyway, I always put the oil in after I fill up with gas.


[/quote]





I have the same thing, and yes it was at advanced auto parts; however a small long funnel is far easier. Basically, I have the advanced auto part device, a small long funnel, and two 16oz (Penzoil yellow bottle from walmart or kmart) at all times on the car.



The worst part is cleaning the funnel afterwards https://www.nopistons.com/forums/pub...1047683664.gif

[quote name='knonfs' date='Apr 19 2005, 10:04 AM']



The worst part is cleaning the funnel afterwards https://www.nopistons.com/forums/pub...1047683664.gif


[/quote]





Which is why I used a pen to hold open the flap door in the filler neck.

[quote name='mazdaspeed7' date='Apr 19 2005, 10:54 AM']Which is why I used a pen to hold open the flap door in the filler neck.


[/quote]





I am afraid of the pen slippin' from my hands and ending up inside the tank https://www.nopistons.com/forums/pub...1047683358.gif

[quote name='knonfs' date='Apr 19 2005, 11:51 AM']I am afraid of the pen slippin' from my hands and ending up inside the tank https://www.nopistons.com/forums/pub...1047683358.gif


[/quote]





Whats it gonna go, get wedged in the fuel pump? https://www.nopistons.com/forums/pub...1047683664.gif

yup, tcw3 from the auto store.



i carry about 3 32oz bottles at most.



fill up gas, poor in 1 oz per 1 gallon as pump meter tells me. close cap, clean up with paper towels at gas station and head out. no tools needed for me, just poor into hole. flapper seems to let in the oil without me moving it.



also, i have only been able to fill 15 gallons maximum. can't imagine jspec engines filling up differently if the tank is the same as aspec

Wow, alot of you guys fill the tank. I personally dont like the feel of the extra weight.

I know I'm a newb, so dont flame me too much here.



Why would you need to premix the gas? I've ridden dirtbikes and I know two strokes need gas premixed but why would a rx7 need to be. https://www.nopistons.com/forums/pub...1047683664.gif

[quote name='bushy' date='Apr 19 2005, 03:32 PM']I know I'm a newb, so dont flame me too much here.



Why would you need to premix the gas? I've ridden dirtbikes and I know two strokes need gas premixed but why would a rx7 need to be. https://www.nopistons.com/forums/pub...1047683664.gif


[/quote]

http://rotaryengineillustrated.com/

http://auto.howstuffworks.com/rotary-engine.htm



Check out those sites. The apex seals have combustion chamber on either sides, and run along the rotor housings, so they need some form of lubrication. The stock setup from Mazda has oil injection, but some people don't like the problems associated with the system after 20 years of age, they may say it doesn't lubricate well enough, or they don't like how it consumes the already-used engine oil. Premixing gaurantees lubrication all across the apex seal, and eliminates the stock oil metering system.



There are other points, and some may argue against what I post, but that's the main idea.

i just use a old oil jug, pour slowly no spillage.