The purpose of this thread is to collect data from as many different trucks and oils used. Oil is a big industry, and most of the big brands are successful by word of mouth, "hype", hearsay, and brand loyalty (think Ford/Chevy). Often times, those stricken with the "brand loyalty" sickness, are blind and unwilling to listen to logic, or believe in scientific data collection (proof). If someone has changed their oil with $2/qt oil every 3k miles for their whole life, and has never had problems, that is great. However, if we can compile enough data in here to show you how to 1. SAVE MONEY, and 2. HELP YOUR MOTOR, then it might be a good read. This thread is probably more directed towards people like myself, who intend to keep our trucks for 100,000+ miles. People who trade their vehicles every 3 years probably won't benefit from this thread, but feel free to post up your UOA if you've done one!
No matter what website you go to, you will read positive reviews on whatever specific oil they are trying to advertise. I say as consumers, let's take it a step further...let's use REAL WORLD examples, backed by lab tested oil samples, taken FROM OUR TRUCKS, and pay it forward to our fellow Tundra members.
Please post your UOA, and let us know which oil you used, how many miles you put on the oil, and what the TBN reading was when your oil sample was tested. There are several different measurements done when the labs test the oil, and to be honest, I'm not sure of the significance of every one, but I'm pretty sure that the TBN reading is very significant. TBN is the
measure of active additive left in an oil sample. If your oil sample has bad readings in some of the other categories, the lab will specifically address those to you.
I recently just started sending oil samples to the lab. My first sample was Mobil 1 synthetic 5w-20. I had 4,794 miles on the oil. I told the lab I was going for 10k mile oil changes. They told me that might be pushing it. They also said I had a TBN reading of 3.0, which is good because it was above 1.0. However, I read about a guy (who will hopefully post his UOA in here) that had 10k miles on his German Castrol, and his TBN was 3.7 (I think), so I feel that I was duped by running the M1, and that I should have run the GC. I replaced the oil with Amsoil Signature Series 5w-20. (supposedly Amsoil is the best of the best, according to "hype", and well written reviews). When I get 5k miles on the oil, I will pull an oil sample, change the oil filter, and top off the oil. I will post the UOA here when I receive it. Based on "hype", I'm expecting to have better UOA numbers than I had with the M1.
It costs $25-35 to send an oil sample in for analysis. Worth every penny in my opinion.
Also, to keep this thread true, debates about dino vs. synthetic oil are not welcome. My intention is to be able to have members research this thread and be able to make educated decisions, based on laboratory results.
***edit*** for my last UOA, I was running a $20 Mobil 1 oil filter, which I figure was a waste of money. I've done a lot of reading on oil filters since them, and from what I gather, the big money filters are a waste of money. I am currently running OEM Toyota oil filters. I got a deal on ebay, $45/shipped for 10 of them. When I take an oil sample at 5k miles, I will change oil filters. When I take an oil sample at 10k miles, and drain, I will replace oil filters. So I will have $9 in oil filters every 10k miles. Do the math....
Do I Need a TBN?
- Bob is the Oil Guy
My very first UOA (Mobil 1 5w-20):
My 2nd UOA (Amsoil Signature Series 5w-20):
Update 7/13/12- Comparing my UOA's for M1 and Amsoil SS:
My first UOA was with Mobil 1 5w-20, with 4,794 miles on it.
My 2nd UOA was with Amsoil Signature Series 5w-20, with 5,251 miles on it.
I was out of town, so I couldn't do the analysis right at 5k miles, but figured since Amsoil claims that this oil is the bomb, I think it would be fair to put 500 more miles on the oil than I did the previous fill with Mobil 1.
The Amsoil gave me some improved numbers, but still not as good as I was hoping for.
The report said that the wear metals were lower than the previous report. In this regard, Amsoil SS wins over Mobil 1.
The TBN on the Amsoil SS was 3.0, which is the same as it was on the M1. In this regard, the oils tie each other. According to Amsoil, The Amsoil SS had a 12.6 TBN when it was fresh.
Both times, I told Blackstone that I'm trying to get to 10k mile oil change intervals. On the Mobil 1, they recommended not going more than 7k miles, based on the UOA they did at the 4,794. On their report on the Amsoil with 5,251 miles, they had similar recommendations, stating that I could go another 2-3k miles on this fill, for a total of around 7k-8k on the oil. In this regard, I think it's pretty close to a tie, but with a very small edge going to Amsoil.
I expected to be able to go to 10k miles on the Amsoil SS, even though my truck is excluded from the extended drain interval, because of the Supercharger. Maybe my expectations were too high. I don't race my truck, I just do a little playing every once in a while.
- Amsoil SS is better for my engine than Mobil 1, based on the reduction of wear metals being present. And the cost of Amsoil was within $1-2 of the M1. With my trial preferred membership, I paid ~$8.75/qt for the amsoil, which includes shipping costs. When I ran the M1, I also used a $20 M1 oil filter, which proved to be a waste of money. When I ran the Amsoil, I used a $4.50 OEM oil filter, and achieved a better UOA than I did with the M1. After I pulled the Amsoil sample, I added 1qt of oil, and changed the oil filter. I will send in an oil sample of the Amsoil at 8k miles, and see what Blackstone says. My next step will probably be to try the German Castrol, and see what kind of numbers I can get out of that. I'm hesitant to jump on the Amsoil bandwagon just yet, without trying 1 more "top performing" oil. Either way, I will not be putting Mobil 1 in my truck again, based on the lab results of my oil samples thus far.
Side note, I also put the Amsoil SS in my wifes car, which had about 2500 miles on the motor when I put the oil in. I will pull a sample when she hits 5-6k miles. Since her car is unmodified, I expect nothing less than being able to run that oil for 10k or more miles. We will see what the UOA says.... (update below - Blackstone said to try 9k miles on the next fill).
UPDATE- 3rd UOA- Amsoil SS 5w-20
Just got back my UOA on the Amsoil Signature Series 5w-20.
Total miles put on the oil was 8,306. That is when I drained it and took a sample. When the oil had 5,251 miles on it, I took a sample, sent it in, I replaced the oil filter, and added a fresh quart of oil. According to Blackstone, that was overkill, as they said that I could have kept the filter in for all 8,306 miles
I don't mind changing the oil filter mid-way through though, it only costs me $4.50 for the filter, and it gives me a reason to crawl up under my truck and look around...and put a wrench on something
They said the sample looked good, had a TBN of 2.6, and wear metals looked low. They noticed a little extra silicon present, which could be from a sealant or additive. They recommended I check my air filtration system also.
They recommended that I try to put 10,500 miles on the next oil
When I drained the Amsoil, I switched to German Castrol (Castrol Syntec 0w-30, made in Germany). I've read a lot of good things about that oil, so I'm gonna try it out. Also replaced the oil filter (OEM), and installed the aluminum oil filter housing cap, and threw away the plastic one.
I think I'll put 7,500 miles on the GC oil before I take a sample of it. I'll go ahead and change the filter then too.
Overall, the Amsoil SS 5w-20 did a good job, and I'm happy with the results it gave me.
Another Update (wife's car- 2011 CX-9)
I had an UOA done on my wife's new car, 2nd oil change. Put 7,450 miles on the oil, and total miles on the vehicle was 9,950. They found that copper and silicone was high, which they attributed to residual stuff from the wear-in process. They also said it should look considerably better next time, and recommended to put 9,000 miles on the next fill
I trust them
(the owners manual "recommends" somewhere around 5-6k mile oil change intervals
) When I drained the Amsoil SS 5w-20 from her car, I filled it with the same GC 0w-30 that I am running in my truck.