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2007 Duramax 8,092 miles on oil with no makeup fluid. AC Delco oil filter. 238,150 miles on motor. Nothing but a stellar report to share! Did not drain all of this batch, only used my fumoto valve for a sample. Blackstone recommended a sample at 12,000 mile mark. Happy reading all!

Hello all! Just wanted to upload my recent UOA on my duramax truck with 8,000 miles on this sample with around 210,000 miles on the truck. As you can see from my previous reports this is the first report that showed some titanium. Blackstone never commented on this as its not alarming, but I...

Hey everyone! I just acquired this vehicle in the description in post.. and this is the first time in my life I have ever pulled a oil dipstick on a vehicle and noticed what appears to be “clutch mud” on the dipstick. If you pull a dipstick to check automatic trans fluid you know what I am...

Posting for a friend... Mobil delvac 15w40 CK4 since new. 15,625 miles on truck. 4,969 Miles on this sample. 3rd oil change. No oil added. Aluminum 7 Chromium 1 Iron 25 Copper 85 Lead 1 Tin 1 Molybedenum 23 NIckel 0 Manganese 1 Silver 0 Titanium 0 Potassium 21 Boron 39 Silicon 17 Sodium 4...

Hello all, This is my first UOA with this vehicle. I have owned this since new and it has had nothing but AC Delco dexos 2 synthetic 5w30 oil in it along with the AC Delco filter. This is the 1.6 liter Ecotec engine second generation engine. Miles on engine 37,749 Miles on oil 5,679 Aluminum 4...

Hello all, I wanted to post my recent Black stone labs UOA on my rig with this Mobil delvac extreme 10w30 syn blend (CK4) 167,000 miles on motor. 10,600 miles on oil with 1.5 quarts added. Ac Delco oil filter S and B dry air filter SUS viscosity @210f 65.7 CST viscosity 11.79 Flashpoint 420...

HI all.. I guess its been some time now (a few years) since ive posted on here. In those few years I acquired a new chevy cruze diesel (6 speed manual) and have just finished my last free dealership oil change using their AC Delco 5w30 Dexos 2 oil with AC filter. Have any of you had experience...

My latest UOA on my truck below.. I haven't done any uoa's on this rig in a few years as I was quite content with my rotella triple protection I was running with a 10,000 mile interval. I scored this Delvac one oil for a very cheap price with the rebates, and am going to extend the interval as...

All.. Does anybody have any evidence on an oil filter related failure due to time and not mileage?? I have heard rumor about an oil filter in general being saturated in oil for enough time cam start to "break apart" internally?? Again just rumors... My vehicle in question is a harley davidson...

I am acquiring a 2002 pontiac bonneville with 160,000 miles as a work vehicle, and wanted some of your personal recommendations for these engines. I have been out of the "gas loop" discussion for awhile now, and have spent most of my time on here lately in the diesel oil section. I know some...

....I see it really does exist! Saw it today at autozone in bay city,MI. This T5 was in the past only available in a 10w30 grade. Not that im exactly jumping to buy this oil..and analyze it and post results here (that gets rather expensive)...but I heard rumor about this oil on this website, and...

Hey all... I was wondering if today's CJ-4 HDEO lubes have enough anti-wear additives to protect older engines with flat tappet cams? I know that the CJ-4 HDEO's have reduced amounts of certain additives compared to older CI-4 version. I got asked this question today by a friend who has an older...

My brother showed me under the hood of his new 2012 sierra 4800 vortec, I saw "dexos 1" stamped on the oil fill cap. I apologise if this topic has been covered many times before..since owning a diesel pickup now for almost 3 years, I havent been up to speed with the PCMO oils lately.. A quick...

Hey all, A friend of mine gave me a 5 gallon pail of this CJ-4 rated John Deere plus II 15w40 after his grandfather passed away (who was a farmer who used this oil). I have ran nothing but rotella since I owned my rig, and have been very happy with my UOA results, and didn't plan to spend the...

All, I just received my 3rd UOA from blackstone labs on my 6600 mile run of rotella 15w40. I have a PDF file downloaded to my desktop on my mac computer, but don't know yet how to upload it to here. (advise please) I ran my first UOA with this oil with great results, but then I wanted to try a...

I overheard some farmers talking at a local tavern about how good this oil is in colder weather. I even heard them rumor about this oil flowing even better then some 5w40 synthetics. I initially assumed they knew not what they were talking about...until I looked at the pour point specs online...

Fellow "oil guru's".....from my many years of studying things online "oil related" and such on forums like this...I have one underlying question for you all? From what I understand about engines, and oil consumption related to piston rings..etc..it seems that while any engine is under a large...

I am reposting this UOA by typing it out by hand, as yesterday I tried to copy and paste my blackstone UOA report on here with no luck... Here is the info Duramax LBZ. 74,000 miles on engine. 12,400 on oil sample. Prior batch of oil was rotella 15w40. Makeup oil was 1.5 quarts. Amsoil EAO oil...

I stumbled across a topic recentley about extending oil change intervals with synthetics, about while a UOA might show low wear metals and such...BUT your engine could be full of sludge!?!? I normally err on the side of caution with what I read on the internet..BUT supposedly this info was...

..HIGH COPPER, which is constantly showing up in UOA's from what I read? If one ran any oil besides Amsoil for a one year/25,000 mile drain interval with stellar results WITHOUT this high copper issue, what would/could be their argument for switching to Amsoil? I am not trying to start a brand...