Oils are labeled at top of each column, scroll down for UOA's.
L to R:
Valvoline 10w40 ATV Dino oil
Castrol 20w50 4T Dino
Rotella T5 15w40 SynBlend
Mobil 1 15w50 Syn
Delo 400 LE 15w40 Dino
Rotella T6 5w40 Syn
This ZRX1200 has ZZR1200 cams, higher compression pistons, ZZR Keihin CVK40 carbs and ZX11 ECU w/+4 advanced ignition rotor. Output is now around 150 hp compared to stock of around 112 hp. This bike gives the oil a great workout and it is quite torquey as well.
Few thoughts...
Rotella T6 was in for over 5000 miles, and I did a valve check and adjustment with shims midstream with that oil change interval. Still, not the best OCI for wear numbers IMO.
Valvoline 10w40 ATV Dino was most recent oil sample, at only 1,400 miles in the engine. Not too impressed with the zinc and phosphorus content, but wear numbers are alright.
As a note, I put in new pistons (higher compression) in January of this year and ran a 30 wt ND for the first 100 miles after the piston install. Then did a drain and fill with a new filter when I put the Valvoline in there.
I would say the best oil I ran to this point was the Rotella T5 15w40 Syn Blend. Stayed in grade, wear numbers are relatively low for the miles, good flashpoint.
Nickel is from the Nikasil plated bores. As Blackstone says, for having just put pistons in the wear numbers are good after using the Valvoline for 1400 miles after an initial 100 mile break in with ND 30 wt.
With that said, the Valvoline 10W-40 ATV oil was drained and refilled with Mystic JT8 15W50 and a fresh filter two weekends ago. I will run that and report back later this summer. Once I have done an analysis with this oil will be able to compare with the Rotella T5 15w40 that did a good job for me. Will probably stick with whichever one seems to look the best.
What I have concluded and I'm open for good discussion on this, is for the most part wear numbers are developed in the first portion of an oil change and tend to stabilize. Despite wanting to see higher zinc and phosphorus numbers in a number of the oils, protection looks to be good so I am not as concerned moving forward as I have been. Interestingly the two oils earlier on when I started testing had the highest zinc and phosphorus but also increased wear numbers in a number of categories.
L to R:
Valvoline 10w40 ATV Dino oil
Castrol 20w50 4T Dino
Rotella T5 15w40 SynBlend
Mobil 1 15w50 Syn
Delo 400 LE 15w40 Dino
Rotella T6 5w40 Syn
This ZRX1200 has ZZR1200 cams, higher compression pistons, ZZR Keihin CVK40 carbs and ZX11 ECU w/+4 advanced ignition rotor. Output is now around 150 hp compared to stock of around 112 hp. This bike gives the oil a great workout and it is quite torquey as well.
Few thoughts...
Rotella T6 was in for over 5000 miles, and I did a valve check and adjustment with shims midstream with that oil change interval. Still, not the best OCI for wear numbers IMO.
Valvoline 10w40 ATV Dino was most recent oil sample, at only 1,400 miles in the engine. Not too impressed with the zinc and phosphorus content, but wear numbers are alright.
As a note, I put in new pistons (higher compression) in January of this year and ran a 30 wt ND for the first 100 miles after the piston install. Then did a drain and fill with a new filter when I put the Valvoline in there.
I would say the best oil I ran to this point was the Rotella T5 15w40 Syn Blend. Stayed in grade, wear numbers are relatively low for the miles, good flashpoint.
Nickel is from the Nikasil plated bores. As Blackstone says, for having just put pistons in the wear numbers are good after using the Valvoline for 1400 miles after an initial 100 mile break in with ND 30 wt.
With that said, the Valvoline 10W-40 ATV oil was drained and refilled with Mystic JT8 15W50 and a fresh filter two weekends ago. I will run that and report back later this summer. Once I have done an analysis with this oil will be able to compare with the Rotella T5 15w40 that did a good job for me. Will probably stick with whichever one seems to look the best.
What I have concluded and I'm open for good discussion on this, is for the most part wear numbers are developed in the first portion of an oil change and tend to stabilize. Despite wanting to see higher zinc and phosphorus numbers in a number of the oils, protection looks to be good so I am not as concerned moving forward as I have been. Interestingly the two oils earlier on when I started testing had the highest zinc and phosphorus but also increased wear numbers in a number of categories.
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