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2003 Duramax running Schaeffers 15w40 Durabilty Advantage and a Wix filter for 10,530 miles. Blackstone mistakenly labeled the sample as Delo. I added 1 qt of Delo at about 6500 miles in. As stated before by others, nothing special to see. Just another boring D-Max UOA. I'll change it in another...

The only work that was ever done since we got the car at about 190k miles was valve cover gaskets, spark plugs, and a few other miscellaneous gaskets. These results are the from the third oil change did on it. First two were running VR1 , didn't get a sample from the second oil change, and after...

Latest UOA from my sons WRX. The switch from VR1 10w30 to Pennzoil Platinum 5w40 Euro seems like it was a good move. The car is a daily driver and sees WOT alot.

The D.I.C. on the car says 7,000 miles for OCI. I don't believe I am going to extend the OCI interval past 7,500 or 1 year. As far as the comment about magnesium, this oil never had a substantial amount in it to begin with. The BMW dealer I have dealt with said they were using BMW TPT 0w20 or...

My Wifes 2015 BMW 328i Xdrive. I have been running Pennzoil Platinum 5w40 Euro since we purchased it used. This OCI was just over 7500 miles and about 13 months. Looks pretty good to me and according to Blackstone as well. I usually find PP Euro on sale at Advance Auto, 5qts and a filter for...

Originally Posted by bluesubie Originally Posted by TurboJW I'm tempted to just order some Redline 5w30. Its cheaper than rebuilding an engine. New WIX air filter was installed last night. Mobil 1 15w50 may be a bit thick don't you think? Is this a stock airbox? Make sure that it is closed...

I'm tempted to just order some Redline 5w30. Its cheaper than rebuilding an engine. New WIX air filter was installed last night. Mobil 1 15w50 may be a bit thick don't you think?

Originally Posted by Buzzinhalfdozen Sorry OP but I had to. You're not wrong!!! Lol. I'm an American car guy.

Originally Posted by oil_film_movies The oil is not the problem. VR1 is a proven one, and 10w30 is a good weight. Of course, a million other cheaper choices exist, so why not try something different. Best value and highest performance is Castrol or Mobil1 0w40 at walmart with better performance...

Originally Posted by ARCOgraphite Is this the 10W-30 Synthetic? [color:#FF9900] Conventional How is the engine running? Any odd noises other than subaru noises? Runs good. No strange noises. The tr for fuel is a good sign. Agreed What issues have you had? Changed valve cover gaskets...

Originally Posted by Linctex Why did you choose VR-1? I have used it in my 87 GN with good results and I keep a small stock on hand. Evidently the WRX doesn't like it though.

Originally Posted by xDoodles Do you plan on trying a 40wt oil or a different brand? When I took the sample we just used the VR-1 again. Upon seeing these results I will most likely look for a better/different oil. Not sure on which one just yet though.

Had trouble uploading file from my work computer. [censored] Windows 10 and Admin lockouts........

My teenage sons 2003 Subaru WRX that we bought with 191K miles now has 196K miles. Running Valvoline VR-1 10w30 oil and changed it at 3000 miles. Less than positive results on the UOA but I am not surprised honestly. It is living up to the name of "#Smurf_Turd".

Originally Posted by JohnnyJohnson One of the best Diesel UOA I've seen in awhile. Why would you want to change to Schaeffer's for twice to cost and very likely little or zero gain? In hindsight I should have taken a sample of the Rotella and waited for the results before changing the oil. As...

Originally Posted by gman2304 No mention of Delvac or Delo in your OP, plus Blackstone mentioned that the Rotella was getting the job done. Hasn't all CK4 HDEO's have been neutered the last few years? The Rotella T4 seemed to take less of a hit in reduction of zinc,phosphorus, etc than the...

Originally Posted by gman2304 Why? If it ain't broke....... Why what? Have it sampled? Switch to Schaeffer's? This past OCI was the first time I ran Rotella. For the previous 200k miles it was either Delvac or Delo. When the CK-4 oils came out, Delvac and Delo seemed to get neutered. That's...

2003 Duramax with 208,xxx miles. Rotella T4 conventional 15/40. 6,200 miles on oil in one year. Only changed it because of a year has passed. I went with Schaeffers 15w40 this time and will most likely go 7500-8000 miles and sample.

Originally Posted by virginoil No Ferrari approval? Is not this the equivalent of the Shell Helix Ultra 5w40. The quart bottles I bought at Advance Auto were silver and had the Ferrari logo on the front and approval on the back label.