Do I need to add oil if I have an omp delete?
 

This could be the dumbest question I’ve ever asked.
when I first got my s4, the previous owner said that he premixed and he explained to me what that meant. I knew what premixing was from my own research but recently I’m starting to get a little confused.
I didn’t entirely realize what an omp delete meant, so I’ve just been premixing (with a 1:1 ratio) and I haven’t been concerned about engine oil at all, but soon I’m going to need an oil change, and now I’m extremely confused.

I didn’t understand why I would need an oil change if I had an omp delete, im starting the think the omp doesn’t do what i think it does.

long story short, I checked my dipstick today and there’s like NO oil in my engine, like at all. Freaking out a little. I’m guessing I’ve burned it all? So I’m pretty sure I have to add more oil now, and I’m wondering what kind of oil should I put in the engine.

so my question is how much oil and what kind should I be putting in my engine if I’m premixing (with a 1oz to 1 gallon ratio) and I have an omp delete? Not sure if it matters but (once it’s warm) I tend to drive the car pretty hard.

im like so confused, any help is appreciated.

You are not mixing 1:1. That would be one gallon of oil for each gallon of gas. 1oz. per gallon would be roughly 125:1. I'd heard 100:1 without the OMP which would be 1.28 oz. per gallon. Someone else would need to chime in to confirm what the proper mix is. Anyway as for engine oil. Yes, it should be checked on occasion like any other engine. It could lose oil if there are any leaks or if some gets by the oil control rings on the rotors it would burn a little. The OMP just injects a small amount of oil into the engine to lubricate the apex seals. The rest of the engine get lubricated by oil from the oil pan like a 4-stroke engine. Yes add more oil until it is between the low and full marks on the dipstick. What kind of oil is a discussion all to itself. I was using Havoline 10w-40. Alot of people like Castrol 20w-50 but it's a little thick for the winter if temps where you live get below freezing. I was using 10w-40 so I could use the same oil year round.

Yes you still need to have engine oil in the oil pan.

... or the smartest! :)

consider what might have happened if you didn't ask.

so, yes, the posts above me hit all the critical points - particularly Dak's.

i will just add a little context. the MOP uses oil from your sump to inject oil directly into the working chambers. it is a pump (as the name states), but that's its only job - lube the apex seals and chamber surface. it hangs off the passenger side of the engine's front cover. as you have with your car, it can be deleted and then you premix to substitute for it's function.

the engine's oil pump is a completely different part. you can't see it from the outside. it is under the front cover and it cannot be deleted. it pumps oil throughout the engine to lube and cool the bearings and also lube and cool the rotors! very important because about a third of the engine's cooling comes from this one job. it also provides lubricity for the gears, side housings, etc.

checking your oil is extremely important for any engine, but absolutely critical for your rotary. you will lose oil through a number of ways even in fresh engine, so think of if your engine has some years and miles to it. additionally, fuel can oftentimes get into the oil, so checking it is important for quality as well as quantity.

change your oil AND filter at sensible intervals. the brand and weight are less important than using an oil that fits your climate and driving use.