Originally Posted By: dgunay
Originally Posted By: CT8
Dragstrip runs aren't much effort and the metals are higher because the oil was run longer and non of the Metals are high.
Ditto!
Originally Posted By: Guitarman200806
@dgunay I used to run the stock Honda S2000 filter (thats what was used on the previous two runs on the slip) but this run was with the Amsoil Ea S2000 filter (Ea15k20 I believe). I have more than one person telling me to use a 0w40 in this car, but I'm hesitant to change as I drive hard and still get good results with the 0w30. Maybe if I road race the car with friends in a few months, I'll consider the 40wt. Idk, I'm kinda curious how the 0w30 would do at a track for 10-20 minute sessions.
As mentioned, xw30 is recommended for K series in North America due to emission purposes. It is totally fine for city driving, cruising or short term racing. But I wouldn't take risk using 0w30 at the track or long sessions.
I used caterham blend at the track (3+ hr in 2 sessions), still runs fine. I have put about 5k miles on the same oil and still using it. No oil consumption so far.
Oh btw, here is my video if you're interested.
https://www.youtube.com/watch?v=Xxe-ZTRjl-E
But the BIG difference is, I live in Toronto. We rarely see 90 f temps around here.
In the US (and in Canada I believe), base model K series engines like the k20a3 and the k24s are actually rated for a xw20 oil for emissions purposes. It's just a trick for some extra mpg. Tolerances are said to be identical in the base and high-end, high-rev engines like our z3. So theoretically, you could use an xw20 in our motor for just light in town driving and would probably see an increase in fuel economy. I am under the impression that Honda has already accounted for the use these high-revving motors get by recommending an xw30 for the sporty models. I believe that the extra layer of protection provided by the xw30 is enough for 99% of these engines and their hard use. I beat the snot out of mine (after a gentle warmup) and have never had a bad UOA on any xw30. If you look at my Blackstone report, the very first results dated 7/10/2013 are from when the car was running honda genuine synthetic blend 5w20. Al is higher as is Iron, but it still wasn't a huge difference. No doubt, the xw30 is a better choice and has been used since in my k20.
I believe that if the xw30 is still giving me 90psi on my oil press. gauge at 8000 rpm, there is no problem using it. At the strip, I did 7 passes consecutively and still had good pressure after every run. Mobil 1 0w40 is a stout oil that I would use if I believed I needed a 0w40 for this car. But with oil pressure and temp gauges, I'm not too worried about running the xw30 at Sebring for the day.
By the way, glad to see you use your Si to greater potential. Nice video dgunay!