s2000_owner

I put about 17 hours of track use on this Pennzoil Platinum 10W30. Some of my metals were high but that could just be due to the amount of track use compared to the average sample. It was noted that my lead may be from gas purchased at the track but I don't remember getting any at the track. I also asked about whether they would recommend an oil cooler based on this report and they said they didn't think it was necessary. They don't see the low viscosity due to shearing being an issue.

What are the bearing (main, con rod, etc.) made of in a 2005 AP2?

bgoetz

Do you have a baffled pan?

s2000_owner

No baffled oil pan.

I should have given more background information, Everything with the powertrain is stock. I was running on stock suspension with 245 BFG Rival tires which would hold about 1 g sustained.

s2000_owner

I should also mention, I measured oil temperatures around 272 F during a 88 F ambient day. I gave this information to Blackstone as well before they made the comment they didn't think an oil cooler was necessary based on this report.

freq

17 hours?!

My 70K mile AP1 will get an oil change tomorrow and I plan on sending in a sample. This sample will have 5 track days on it

bgoetz

while I don't think your sample looks bad, it looks quite similar to some that I have had, I think I would invest in an oil pan if your doing that much time on track. I could see the difference in my oil sample results when I would go to Gingerman which really seemed to have long sustained Gs vs other tracks. To me that means the increase in wear metals have to be from the track time and if there is a cheap solution to reduce the wear why not. So I will be investing in an oil pan this winter.

zeroptzero

Wear metals do look high but obviously a lot of track use with 17 hours worth. Oil has sheared a bit.

With those oil temps I would run a 40 weight, the extra viscosity at high temps would be worth it IMO. With the shearing and higher temps that oil would have been pretty thin in track conditions. Baffled oil pan would be a good investment.

bgoetz

Looking back your results are pretty identical to mine with 5hrs track use and 3k miles road. This was after a hard weekend where I was filling a catch can every session though. I conceded that it was noticeable wear likely due to not having a baffled pan and momentary starvation. I took this year easy and have not done a single track event, I have driven less than 2k miles and have yet to change the oil. If I get wear metals that are similar then my theory is wrong and it is just wear. Either way a baffled pan is going in, I don't like that tracking it shows up in the wear metals like that and if it can be reduced, why not.

s2000_owner

I get about 2 hours of track time per track day so yea that is about 8 track days. I'd prefer to do a little shorter oil change intervals in the future.

I was under the impression baffled oil pans where generally for people with "track tires" (sub 200TW). However I do visit Atlanta Motorsports Park which has a long sweeper that I can experience fuel starve with ~1/2 - 2/3 tank of fuel.

I'm interested to know where the high aluminum, steel, and lead as coming from. As in which components are wearing? I'm still unsure if the S2000 uses aluminum alloy bearing or Babbitt/tri-metal bearings? The cylinders are FRM lines would means the iron (steel) shouldn't be coming from there.

Any ideas?

Soviet

I believe the lead comes from the bearings. I read that the crank and cams are steel and the rest is aluminum.