I purchased an R8, my dream car, almost a year ago to the day. It is a 2009 with only 18k miles on it. I've had two situation relating to oil warning lights that I'm wondering about. The first took place after the Audi dealer that I took it to for an oil change and checkup, after I got it back home, was somehow a quart short from filling it entirely. I drove it home (about 20 miles) from the dealership, with no issues. The next day. I took it out for a ride in the country, and about two hours into the trip, the low oil warning light came on. I had trouble making any sense of it since I had just literally had the oil changed. The light did go out after a few minutes, which further confused me.
When I got to a full service gas station a few minutes later, I checked the oil level (following the proper procedure for an R8 V8), and discovered that the oil was indeed a bit low. I called the dealer, and they apologized profusely for the error, and told me to add a quart, and recheck the oil level. Following the addition of a quart, all appeared well. I never again experienced an oil light again for the remainder of the five months I drove the car until storing it for winter.
Skip to the other day. I took the R8 out for yet another run in the country. I was about three hours into the trip, and heading back towards home when I hit a very small, unseen bump in the road. Immediately following that, the low oil light came on, but only for about 30 seconds, and then went off again. I rerouted myself to a major road where a gas station would be available, and stopped and checked the oil. Again, I ended up being just barely a quart low. I added a quart of new oil, and all was well again. However, I'm seriously wondering if the low oil light can really be relied upon. Given how much oil the R8 holds (almost 11 quarts), it seems a bit ridiculous to have a warning come on, (and, for that matter, go off shortly after) when the engine is only a quart low. Is this common with R8's? Is this another situation like the common issue with German engineered cars that will turn on low tire air warnings non stop until you address it, even if the tires are a pound low? And if thats the case, why did the light go out after coming on?
Also, having read the manual extensively, it stats that and I am paraphrasing, "the R8 utilizes a very high performance engine and it is not unusual to see consumption of a quart every 1200-2000 miles". Is that also accurate? I've had other high performance cars that barely used a drop of oil between oil changes.