Amsoil SS AMR 5w-50 7700 miles Boss 302 5.0 Ti-VCT

[jmaster]

This is the first sample I've taken. Usually I err on the side of safety when it comes to oil change intervals. I went more than 3 years on this oil so I went ahead and dumped it. Strange the viscosity reads so low(19.4 is new oil spec KV). This is a street driven, weekend car, no short trips.

Car is my 2013 Boss 302. Previous 2 oil changes were with the same oil, and when I bought at 22,000(now 48,000) it had what I presume was Motorcraft 5w-50 that I drained out with ~25% oil life remaining.

Filter used was Royal Purple synthetic media. I installed long tube headers halfway through this oci. It has the same K&N stock replacement filter as when I bought it, never cleaned!(looks ok)

 

[fantastic]

Strange the viscosity reads so low(19.4 is new oil spec KV).

If that 19.4 is taken from a PDF from the oil Co. they don't always line up. Best to do a VOA to get the comparison numbers from your lab. UOA looks good & I bet the car is a lot of fun. Is that automatic transmission?

 

[buster]

Not bad at all for 3 years LOL. I'd expect some corrosion wear but wear numbers are low. Viscosity drop is expected in a 5w50.

 

[jmaster]

If that 19.4 is taken from a PDF from the oil Co. they don't always line up. Best to do a VOA to get the comparison numbers from your lab. UOA looks good & I bet the car is a lot of fun. Is that automatic transmission?

It is a 6 speed Getrag MT-82, all Boss 302s are manual. It is a hoot, unlike any Mustang I've had, it stops and turns pretty good as well. Raw while being more comfortable than any older Mustang I've driven.

 

[addyguy]

5W-50’s almost always shear out of grade, it’s a very wide spread to cover. For 3 years in sump not bad results.

 

[OVERKILL]

If you are buying AMSOIL, I'd recommend using their oil analysis service as well, which is more comprehensive than Blackstone. Good to get a baseline sample as well, so you know where you started vs where you ended up.

 

[JavierH19]

If it's a street car given the occasional wot to have some fun any off the shelf euro 30 or 40 grade is good enough. These in the f150 and non track package equipped 5.0 mustangs get 5w-20.

 

[OilStainedNapkin]

At that interval I’d just go Mobil 1 (any flavor) and call it a day

 

[jmaster]

I hear you, I've been debating this myself. When I finally do track this I think I'll just go to Joe Gibbs racing oil or similar, and run some of the gallons of 40 weight Mobil 1 I have off the track.

If it's a street car given the occasional wot to have some fun any off the shelf euro 30 or 40 grade is good enough. These in the f150 and non track package equipped 5.0 mustangs get 5w-20.

At that interval I’d just go Mobil 1 (any flavor) and call it a day

 

[Dutchy491]

So you’re running an oil that works pretty well, as shown by the UOA above. Now when you go to track it you’re going to run a different oil? Why not run the same Amsoil and compare how tracking will affect the oil, compared to just grocery getting?
Why did you even bother doing a UOA…inquiring minds want to know

 

[ScottyB]

for 3 years of intermittent driving that strikes me as a pretty solid report. it would be good to see something like the nitration/acidity at that point so as mentioned, give Amsoil/Oil Analyzers a shot next time.

sweet car. i've wanted one forever (in lime or grabber blue/orange) and even shopped them for a bit as a daily, but the market at the time was full of either collector's items or clapped out racers with nothing in between.

 

[jmaster]

I was looking for grabber blue but everyone wanted a premium at the time. I liked the orange but wanted the hid headlights and led tails the 13s had for no price difference between 12 and 13. I settled on red with Torsen diff and Recaro seats and had the trackey activated. The wot a/f reads 12.5 before and after with headers with the trackey, normal key is a bit more lean, never used it anyway.

I'd definitely going with oil analyzers next since seeing Lake Speed Jr's videos. Tbn is not everything as blackstone seems to think it is.

 

[Pablo]

So you’re running an oil that works pretty well, as shown by the UOA above. Now when you go to track it you’re going to run a different oil? Why not run the same Amsoil and compare how tracking will affect the oil, compared to just grocery getting?
Why did you even bother doing a UOA…inquiring minds want to know

Because many people on this site, regardless of results feel sworn to steer people away from Amsoil. It's in their blood.

OP went three years and almost 8000 miles on the oil. Results look good. Everyone's favorite, TBN is fine. Wear looks good. Silicon is fine, sodium - maybe 11 ppm normal, watch that for some dirt intrusion. OP not near salt air, so I would expect less than 10 ppm. Not really a concern, just noting. K&N air filter?

 

[Gasbuggy]

Looks great. Always like the Boss. Great bang for the buck.

 

[jmaster]

Because many people on this site, regardless of results feel sworn to steer people away from Amsoil. It's in their blood.

OP went three years and almost 8000 miles on the oil. Results look good. Everyone's favorite, TBN is fine. Wear looks good. Silicon is fine, sodium - maybe 11 ppm normal, watch that for some dirt intrusion. OP not near salt air, so I would expect less than 10 ppm. Not really a concern, just noting. K&N air filter?

Yes came on the car when bought, never recharged it as it looked ok. Is sodium associated with agricultural chemicals and fertilizers? I drive through a lot of farmland.

 

[rijndael]

Is sodium associated with agricultural chemicals and fertilizers?

This Post:

Similar to Calcium, Sodium is another soft metal, a highly reactive alkali metal, that is showing up in many formulations these days as additions to calcium compounds. Many formulators are using the sodium packages as co-detergents.

Just a calcium detergents are either of the the calcium sulfonate or calcium salicyillate type, sodium detergents can also be sodium sulfonates or sodium salicyillates.

There are other compounds of sodium that are also useful as oil additives and which may be part of the Performance Improvement (basic PI additive package) as well. These may contribute to the sodium readings found in many oil analysies

Sodium 2-mercaptobenzothiazole can be used as a metal deactivator to keep metals from reacting with other compounds, and to help retard oxidation.

Some sodium compounds such as sodium dibutyl dithiocarbamate SDDC) are used as another anti-wear agent in lieu of conventional AW compounds. SDDC shows a low fricton coefficient with good polarity since being a dithio-type compound, has sulfur atoms for polarity enhancement.

 

[Pablo]

Yes came on the car when bought, never recharged it as it looked ok. Is sodium associated with agricultural chemicals and fertilizers? I drive through a lot of farmland.

It could very well be, but 11ppm is nothing to worry about.
And yes it could be part of some additive but again, so little and I've not seen a VOA of this oil.

 

[burbguy82]

stayed perfectly in grade