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Originally Posted By: ltslimjim Originally Posted By: Al As we used to say when the RedLine gave less than steller UOA's, "Its cleaning things up" The Cr is low so it is probably not coming from the cylinders. ^This. +1 The Red Line could definitely be cleaning things out some while your...

Originally Posted By: Skid The silicon is from the Redline. http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2141562 I love Redline gear oils, but wouldn't run their engine oils. Good point on the silicon. I see the virgin analysis in the link and found an old virgin...

Originally Posted By: tig1 Why use an oil so high in zinc and phosp? Your engine is not designed for that. Use a quality synthetic like PP or M1. IMO. Also GM engines are known to show higher metals in UOAs, but that doesn't mean high engine wear. GM engines last very well, so If you are going...

Hi guys, Looking for some advice on high iron numbers that I'm starting to see on my 2008 Chevy Trailblazer SS with just over 57k miles on the LS2. Engine is all stock other than an IEATSRT8 CAI (uses an S&B filter). This is my Fall/Winter daily driver and it sees mostly just highway miles - no...

Interesting observation on the boron. The two samples with the higher boron levels were the old PU that I used to get in the the 5qt Walmart jugs. The most recent sample was the last of my PU stash, which consisted only of PU quart bottles, some of which I had picked up on closeout at Walmart...

Correction: the 02/26/11 sample was also PU 5W-30. I've never run PP in this vehicle. Nor used any oil additives.

Originally Posted By: steve20 reference prior tests--boron = 300+ was this an additive you were using which came back to cause high Fe levels later on? Nope. No additives used. For reference, the prior samples were as follows: 11/13/10 sample - M1 5W-30 02/26/11 sample - PP 5W-30 10/08/11...

This is an odd sample from my 2008 Trailblazer SS LS2 at 56k miles. Its the first sample that I've taken since 2011 since it was very consistent before. The high iron has me a little concerned. This may not be relevant, but the strange thing is that I sent in a sample for my 2009 Chevy Cobalt...

Thank you all for the feedback. I'll just use the PU I have on hand.

I have an odd question. I'm about to replace the high pressure fuel pump for my Cobalt LNF engine and the service manual indicates that "silicon-free engine oil", GM p/n 12345610, which I believe is just regular old GM Goodwrench 5W-30, must be used to lubricate a few of the fittings...

Well, I contacted Blackstone and it looks like there was indeed an error made with my sample. They apologized and immediately sent me an amended report that no longer shows any fuel. Feeling better now

Originally Posted By: cp3 Originally Posted By: cchase Not if the drive was short and past oil changes were made with a cold engine that had previously been run for a reasonable distance. A short run preceding this oil change would result in a high fuel reading. A long run at any point...

Originally Posted By: cp3 It should have the reverse effect though, driving and getting oil up to temp should burn off any fuel in the oil. Any more idleing this OCI? It seems odd to me that this sample has much more fuel yet also a higher flash point and 100 cSt, again reverse of what you...

Originally Posted By: cchase Wear metals look similar to my LS2. Air filter looks like it's doing a good job. What is your oil change procedure? Was the oil cold when changed or had you just returned from a drive? Hmm... That's a good question. I usually change the oil in my cars with the...

This is the third UOA that I've done on this 2008 Chevy Trailblazer SS since I purchased it used almost two years ago. The first UOA was using Mobil1 5W30 and the most recent two were using Pennzoil Ultra 5W30. For all of the samples I have been using K&N HP-1017 filter. Only modifications to...

Originally Posted By: Steve S You need to run the syn oil more miles if you are going to see any benefits from the extra money you spent on the oil. I'll be running it longer next time.

Originally Posted By: RedOak Nice comparison of two different top tier synthetics. Wear looks good. You could go longer on M1 or PU. I'm running PU again for this OCI and am planning on running it at least another 1000 miles this time. I just wanted to see how the Sodium was doing and get a...

Originally Posted By: Brons2 wow that engine design throws a lot of copper - the universal average is 86! Compared to the averages, your report looks right in line with them, although if it were my car I would consider using a thicker oil as the LSx engines are reported to like them. I've...

Here are the last two UOAs for my 2008 Chevy TBSS. The previous sample (4923 miles) was M1 5W30 and it was the first oil run after I bought the vehicle. The current sample is using PU 5W30. For both samples the oil filter used was a K&N HP-1017 and the air filter an S&B (IEATSRT8 CAI). Mileage...

My intention isn't to change it this often. This was just a reference point for me. Historically, on my non daily drivers, I usually don't go more than a year on any particular oil without doing a UOA. Based on what I see here I'm going to go longer next time - maybe 18 months - and see how it...