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This is my track car and fast road use toy. There are more track days on this oil sample than I can remember.
Time on this oil is just over three years at 38 months.
The recommended oil grade is 5W-50 and I did use it years ago when I first got the car but the oil temp's, particularly on the street are too low to warrant such a heavy oil. So gradually I've used lighter and lighter oils finally settling on 0W-20s about six years ago. The car's driveability and overall performance is so much better with a 20 grade oil.
The previous UOA is also shown (a second sample was sent in because Toromont didn't do a TBN test on the first). The review of the first UAO is below:
http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3891389/1
The initial fill included 3 oz of RL Break-In Additive to raise the phosphorus level up to about 1,000 ppm and a pint (12%) of Sustina 0W-50 to raise the hot (80C, 176F) street use oil pressure to 5 bar (72-73 psi) at high rev's. This was the lightest oil I have ever run on start-up (lowest OP) due to it's ultra high 229 VI and was still lower than what I like once up to low normal street oil temp's; hence the reason to thicken it up some. I didn't have to do this with the previous lower 199 VI Honda (Idemitsu) 0W-20 but I did with the previous TGMO. This is more than the minimum recommended OP of 4.4 bar (63.8) psi but at the track oil temp's can rise as high as 105C (221F) so it's an approximation to compensate for the lower OP (lower operational viscosity) at the track.
As it turned out on a very hot track day at Watkins Glen in July/14, oil temp's actually approached 110C (230F) at the end of some afternoon track sessions and the OP did drop to 4.1-4.2 bar (60-61 psi) but knowing the very high VI was part of the reason and that I had already raised the HTHSV of the oil somewhat I didn't thicken the oil up any further. As it turns out I haven't seen oil temp's that high since. In fact on some track days in the early spring or late fall I may not see oil temp's above 85C (185F).
About a litre of oil in total was added incrementally as top up to keep the oil level just over the full mark on the dipstick with close to 4 litres of oil in the sump at all times. Any less and the oil pick-up tube can suck air under hard braking.
The last top up was at the 4,927 kms mark and instead of fresh oil I added 400 mls of used Idemitsu from the previous fill in anticipation of changing the oil out soon.
I'm pleased with the UOA results with the exception of the 28 ppm of silicon which undoubtedly is grit getting through the K & N air filters. I'm sure the 16 ppm of Fe would have been lower with better air filters. The highish Si level was noted in the previous UOA so I cleaned, re-oil and better sealed the filters in the hope that might help but obviously it's the filter elements themselves that just don't do a particularly good filtering job. Their main claim to fame seems to be low induction restriction to maximize power at the expense of filtering.
With a remaining TBN of 5.5 and Tan of 1.10 there appears to be plenty of life left in this oil. I'm sure 5 years and 10,000 kms might be a reasonable OCI. Time really isn't a factor unless you're operating in sub-freezing temp's without bring the oil up to temperature which isn't he case here. And track use with tons WOT conditions and maximum 7,000 rpm rev's don't seem to shorten the oil life much plus my maximum oil temp's are in the ideal range.
My current fill is Fuchs Titan GT1 XTL 0W-20 that I've had in my oil stash for a while now and want to use up.
It's an expensive race tested, ester based, Zinc free oil that's not available in the States. It is quite a bit heavier than the Sustina with a more typical 172 VI and an estimated HTHSV in the 2.75-2.8cP area I suspect based the higher oil pressure.
In fact compared to the thickened up Sustina, the cold idle was a bit too low to prevent stalling so I've had to turn up the idle speed a bit to compensate for the higher oil drag.
Consequently once the oil is up to temperature the rev's are a bit high. Hopefully with the warmer weather I might be able turn down the idle a bit, we'll see.
So maybe five years on this oil...?
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This is my track car and fast road use toy. There are more track days on this oil sample than I can remember.
Time on this oil is just over three years at 38 months.
The recommended oil grade is 5W-50 and I did use it years ago when I first got the car but the oil temp's, particularly on the street are too low to warrant such a heavy oil. So gradually I've used lighter and lighter oils finally settling on 0W-20s about six years ago. The car's driveability and overall performance is so much better with a 20 grade oil.
The previous UOA is also shown (a second sample was sent in because Toromont didn't do a TBN test on the first). The review of the first UAO is below:
http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3891389/1
The initial fill included 3 oz of RL Break-In Additive to raise the phosphorus level up to about 1,000 ppm and a pint (12%) of Sustina 0W-50 to raise the hot (80C, 176F) street use oil pressure to 5 bar (72-73 psi) at high rev's. This was the lightest oil I have ever run on start-up (lowest OP) due to it's ultra high 229 VI and was still lower than what I like once up to low normal street oil temp's; hence the reason to thicken it up some. I didn't have to do this with the previous lower 199 VI Honda (Idemitsu) 0W-20 but I did with the previous TGMO. This is more than the minimum recommended OP of 4.4 bar (63.8) psi but at the track oil temp's can rise as high as 105C (221F) so it's an approximation to compensate for the lower OP (lower operational viscosity) at the track.
As it turned out on a very hot track day at Watkins Glen in July/14, oil temp's actually approached 110C (230F) at the end of some afternoon track sessions and the OP did drop to 4.1-4.2 bar (60-61 psi) but knowing the very high VI was part of the reason and that I had already raised the HTHSV of the oil somewhat I didn't thicken the oil up any further. As it turns out I haven't seen oil temp's that high since. In fact on some track days in the early spring or late fall I may not see oil temp's above 85C (185F).
About a litre of oil in total was added incrementally as top up to keep the oil level just over the full mark on the dipstick with close to 4 litres of oil in the sump at all times. Any less and the oil pick-up tube can suck air under hard braking.
The last top up was at the 4,927 kms mark and instead of fresh oil I added 400 mls of used Idemitsu from the previous fill in anticipation of changing the oil out soon.
I'm pleased with the UOA results with the exception of the 28 ppm of silicon which undoubtedly is grit getting through the K & N air filters. I'm sure the 16 ppm of Fe would have been lower with better air filters. The highish Si level was noted in the previous UOA so I cleaned, re-oil and better sealed the filters in the hope that might help but obviously it's the filter elements themselves that just don't do a particularly good filtering job. Their main claim to fame seems to be low induction restriction to maximize power at the expense of filtering.
With a remaining TBN of 5.5 and Tan of 1.10 there appears to be plenty of life left in this oil. I'm sure 5 years and 10,000 kms might be a reasonable OCI. Time really isn't a factor unless you're operating in sub-freezing temp's without bring the oil up to temperature which isn't he case here. And track use with tons WOT conditions and maximum 7,000 rpm rev's don't seem to shorten the oil life much plus my maximum oil temp's are in the ideal range.
My current fill is Fuchs Titan GT1 XTL 0W-20 that I've had in my oil stash for a while now and want to use up.
It's an expensive race tested, ester based, Zinc free oil that's not available in the States. It is quite a bit heavier than the Sustina with a more typical 172 VI and an estimated HTHSV in the 2.75-2.8cP area I suspect based the higher oil pressure.
In fact compared to the thickened up Sustina, the cold idle was a bit too low to prevent stalling so I've had to turn up the idle speed a bit to compensate for the higher oil drag.
Consequently once the oil is up to temperature the rev's are a bit high. Hopefully with the warmer weather I might be able turn down the idle a bit, we'll see.
So maybe five years on this oil...?
