Recent content by AMRoberts

Originally Posted By: Quattro Pete Just curious, so the sample taken at 16K miles on 10/07/10 was M1 HM 10w-40? Looks like the oil did well there, despite the top ups. It was. I don't know what oil the previous owner was using. When I purchased the car it was probably using 1qt every 2000...

For reference, a T6 VOA is here. Took advantage of last year's Rotella rebate to get this oil into the inventory. My goals were: more ZDDP than the Mobil 1 10W-40 HM I had been using and at least marginally thinner oil. The 3,640mi sample didn't surprise me much. Given what I've read here...

The 5/27/2010 Mobil 1 Engine Oils chart showed 0W-40 edging out the HM oils for ZDDP, 5W-40 TDT having higher levels than 0W-40. VOAs last year on Mobil 1 10W-40 HM, Mobil 1 5W-40 TDT, and Shell Rotella T6 5W-40 showed the HM closely matching the published PDF, TDT lower (probably within any...

Caterham, No time to hunt the forums right now, but I think I've seen mention of Rotella T6 in a different viscosity north of the border. Raises the possibility that the formulation could differ, even for the 5W-40. Did Shell Canada technical service happen to mention if T6 was the same...

A_Harman, Originally Posted By: A_Harman ... So CI4+ has the most anti-wear additive, and higher TBN. The later stuff is formulated to protect after-treatment systems, which my truck does not have. API indications on the bottles aside, I ran VOAs of Rotella T6 and Mobil 1 TDT in mid-2010...

A_Harman, You wrote: Originally Posted By: A_Harman ... The HTHS of some 5w-40 diesel oils: ... Shell Rotella T6 = not listed No disagreement, but Shell does claim CJ-4, which has a minimum HTHS requirement of 3.5 (reference); ACEA E9, also with a minimum HTHS requirement of 3.5 (reference)...

So am I interpreting this correctly as one or more of: there are anti-wear/extreme-pressure components in the additive package which aren't part of what Blackstone is testing for and reporting the moly is expected to make up for loss of ZDDP for AW/EP purposes avoiding cat posioning has won...

http://www.mobil.com/USA-English/Lubes/PDS/NAXXENPVLMOMobil_1_High_Mileage_Oil.aspx The Mobil 1 HM 10W-40 and 10W-30 are both ACEA A3/B3/B4, and the HM 5W-30 has an HTHS viscosity that is 97% of the minimum required by the 2008 ACEA spec. They don't carry quite the amount of EP/AW additives...

Originally Posted By: ARCOgraphite No mystery you can buy diesel oil for you old car, but the high level of CA/MG metals base detergency is NOT GOOD for reducing wear as the detergent compete for surface with the ZDDP. ... But ARCO, don't diesel engine designers want anti-wear additives for...

At the risk of stating the obvious, I'll toss in a few from a different angle: a) Cheaper is what you can purchase with cash, so you avoid paying interest to someone b) Cheaper is a make/model where you have a local indie repair shop available that is skilled with the make, for the repair jobs...

Originally Posted By: Ponch "Quattro pete" I did ask them about HT/HS and NOACK volatility specs, and their reply was "HT/HS and NOACK are set in API classifications, and shell rotella T6 meets them all"... Which implies a max NOACK of 13%, and min HT/HS of 3.5, per...

Originally Posted By: Kestas ... Compared with other cars, the E320 is rather easy to do a complete fluid exchange without making a mess. True enough. After I read the DIYs on other forums about the technique that involves pulling the return hose and using the operating pump to flush fluid, I...

Dan, I was pretty sure when I bought my 95 E320 that it had never been done (very black, no bottom of the reservoir in sight). Given all the BITOG discussion about gentle engine sludge cleanup, I decided to take an analogous approach with the PS system. I bought one of the inexpensive siphon...

Originally Posted By: LoneRanger Which has more Zinc, TDT CJ4 or Rotella Synth CJ4? Earlier this year VOAs for M1 TDT and Rotella T6 had higher levels for T6, but perhaps all within batch tolerances?

Trying to get my brain wrapped around this thread ... Originally Posted By: Doug Hillary ... I have long pushed the importance of using at least the OEM's minimum mandated HTHS viscosity when using non Approved lubricants. It is of course a cornerstone of the ACEA's system So if I look at the...