No problem! The Nulon Racing 5w40 looks like an incredible oil - Bang for buck I think its hard to beat Penrite though (e.g picked up 20L for $45/5L).
I actually order my UOAs through Nulon and they send them through to a lab in NSW.
Honda S2000 90k miles; 1k Miles on Penrite Racing 10w40
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No problem! The Nulon Racing 5w40 looks like an incredible oil - Bang for buck I think its hard to beat Penrite though (e.g picked up 20L for $45/5L).
I actually order my UOAs through Nulon and they send them through to a lab in NSW.
Hello all,
The latest iteration of my S2000's UOA journey is attached. This was running Redline 5w40 with (almost) exclusively track use. I also note that compared to other UOAs, I drove the car much harder - and on semi slicks.
Pretty pleased with the results, Being picky, I'd like to get the lead and silicone down. I will try a new OEM air filter and remove my K&N (oiled) oem replacement.
The latest iteration of my S2000's UOA journey is attached. This was running Redline 5w40 with (almost) exclusively track use. I also note that compared to other UOAs, I drove the car much harder - and on semi slicks.
Pretty pleased with the results, Being picky, I'd like to get the lead and silicone down. I will try a new OEM air filter and remove my K&N (oiled) oem replacement.
dnewton3
Staff member
Pretty impressive for flogging her at the track for 2k miles.
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- Dec 27, 2020
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Stay away from the Krap and Nasty filters. Always high SI.
Hello again,
The latest UOA from my S2000 is attached. I also cut open the filter, with an interesting (and possibly not problematic) find inside - see that thread here https://bobistheoilguy.com/forums/threads/honda-s2000-pcx-004-cut-open.365500/#post-6392825
The 3 fold increase in lead is a bit concerning - I did use a bottle of redline Si-1 and not sure if that has played a part in the elevated number.
The latest UOA from my S2000 is attached. I also cut open the filter, with an interesting (and possibly not problematic) find inside - see that thread here https://bobistheoilguy.com/forums/threads/honda-s2000-pcx-004-cut-open.365500/#post-6392825
The 3 fold increase in lead is a bit concerning - I did use a bottle of redline Si-1 and not sure if that has played a part in the elevated number.
Hello again,
Not many miles (km) on this latest UOA - 924km (mostly track km) and the oil sitting in the pan for about 9 months. Wanted to change early to see if the lead level would come down (which it has). There are some posts out there that mention that redline could 'leach' metals from the engine - I don't really understand this and I am not too sure. The other metals look good. (The previous UOA is also included below) EDIT: the previous run is with redline 10w30.
I may skip the sample next time around and sample again afterwards to see how that lead level is looking.
For completeness, I added a bottle of Liquimoly Ceratec to Penrite Racing 10w40. There is a crazy amount of Boron and the addition of Moly where there previously was none.
Not many miles (km) on this latest UOA - 924km (mostly track km) and the oil sitting in the pan for about 9 months. Wanted to change early to see if the lead level would come down (which it has). There are some posts out there that mention that redline could 'leach' metals from the engine - I don't really understand this and I am not too sure. The other metals look good. (The previous UOA is also included below) EDIT: the previous run is with redline 10w30.
I may skip the sample next time around and sample again afterwards to see how that lead level is looking.
For completeness, I added a bottle of Liquimoly Ceratec to Penrite Racing 10w40. There is a crazy amount of Boron and the addition of Moly where there previously was none.
If you account for the lead in the residual oil in the engine after the last OCI, the lead would be almost back to the 7 ppm level of the last two UOAs. Probably still quite a bit higher than average for a non-tracked S2000 on longer OCIs, presumably from bearing wear. Do you have any UOA's for other S2000's that are primarily tracked?
You're already using a 10W-40, but your oil might be getting hot enough on track to warrant a thicker grade. Maybe the bearings would be happier with a 15W-50, or you could install an oil cooler to keep oil temperatures down. Your UOAs with the highest lead and tin were both with xW-30 oils, which might mean something.
You're already using a 10W-40, but your oil might be getting hot enough on track to warrant a thicker grade. Maybe the bearings would be happier with a 15W-50, or you could install an oil cooler to keep oil temperatures down. Your UOAs with the highest lead and tin were both with xW-30 oils, which might mean something.
I would say that cylinder wall scoring is more likely with a wider spread in winter and hot viscosity: if that 50W was actually a 5W-50 I'd expect the base oil to be very thin indeed. 20W-50: not at all thin. oil cooler would help very little with cylinder wall oil temps: they are water cooled on one side and heated by combustion and shear on the other.
Thats interesting. Are you saying a 10/15w 40 or 50 would be ideal in that case? and that a 5w40 is thinner at temp than a 15w40 for example
A 5W50 is thinner under shear than a 15W40 in most cases, definitely when it's a full synthetic 15w40 like motorcycle oils can be
A 5W-40 will have much lower viscosity at very high shear rates than a 15W-40. Pistons and cams experience these very high shear rates, but your wear metals are probably from the bearings. For bearings, shear rates are lower and there won't be as much of a difference, and the oil's HTHS will provide a good estimate for the viscosity in the bearings.
There is no difference in the minimum HTHS requirement between 10/15W-40 and xW-50 grades. They're both 3.7 cP. For a 5W-40 the minimum HTHS is 3.5 cP. It's important to look at the data sheets for 50 grade oils, because many of them will have lower HTHS than a typical 10/15W-40.
HTHS isn't always published for oils. Mobil 1 15W-50 has a high HTHS at 4.5 cP. Amsoil has some 40-grades with high HTHS as well.
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