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  1. Z

    Minimum HTHS for Rotary engine in RX8?

    3 weeks ago I bought 04 Mazda RX-8. It will serve dual duty as a daily driver and occasional track car. What is the minimum HTHS viscosity for good wear protection in the rotary engine? I know you want min HTHS of 2.9 in piston engines. How does this plays out in rotary engines? Has there been...
  2. Z

    M1 0W-40 2005 Mercedes Benz C230, 13000 miles

    Got this UOA from MB forum. Not bad showing for M1.
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    Porsche 944 Turbo, Mobil1 10w-40, Turbo Failure

    This UOA is from my friends track car, done after a turbo failure. He runs leaded race gas which would explain high lead count but what is going on with aluminum and chromium!? Any advice on what could be wrong with the car is appreciated since he needs to address it before taking it to the...
  4. Z

    Anyone in DC area with oil extractor I can borrow?

    Is there anyone on this board with oil extractor in DC-VA-MD area I can borrow to get an oil sample. I am on my first redline 5w-30 fill and 7k miles into it with one track event on it. Have another event in 2 weeks at VIR and wanted to send sample to see if I need to change oil before the...
  5. Z

    Redline D4 in 2006 Mercedes 5sp automatic?

    Mercedes specs Shell ATF 3403 M115 for this tranny (2006 c280 4matic) that is only available at the dealer with astronomical markup. Is anyone else using Redline D4 fuild instead and what are pros/cons of doing so? Looking at the redline D4 spec page thay list it compatible with so many ATF...
  6. Z

    Thinner oil heats up more quickly in my audi

    I did this test while ago. I collected the oil temperature data from my car on my way to work. Just before I changed from GC 0w-30 to Syntec 5w-40 or the other way around. as you can see from the chart GC comes up to temperature quicker even though it starts few degrees cooler.
  7. Z

    What is the bearing metallurgy used in 2001 Audis?

    I just got results of my UOA back and there was unusually high aluminum reading, while all other metals were fine. Latest UOA I think high aluminum reading might be due to the way oil was sampled but just to make sure I would like to find out what is the 2 and 3 material bearing shell(shown...
  8. Z

    GC 0W-30, 4700mi 2001 Audi S4, 4 track days

    This OCI car saw 4 track days with oil temps between 250 and 275F. Previous 3 UOA's are also with GC. Redline 5W-30 went in this time. I am bit concerned about aluminum. Thinking about it I realize now that I might have made mistake while taking oil sample. I didn't take the drain plug...
  9. Z

    Castrol Edge Sport 10W-60 benefit claims - discuss

    Below is what I got off the Castrol info sheet for this oil. Two of the claims(highlighted in bold) got my attention. How exactly would oil help maintain boost pressure? Edge Sport 10W-60 "New Formulation" ________________________________________________________________________________...
  10. Z

    Quicker turbo spool up with redline 5w30 then GC

    I have been running GC in my twin turbo Audi S4 for the past 4 years. Oil did well during the street and track use as confirmed by my UOA results. This weekend I replaced GC with Redline 5w-30 to get a bit more safety cushion with high oil temperatures car sees during the track duty (275-280F...
  11. Z

    Is anyone using Valvoline syn 10W-30 racing oil?

    I heard some good things about it and thinking about using it when I take my Audi to the track. How does it compare to redline 10W-30? Does it really lower oil temps? How long OCI can you run with this oil?
  12. Z

    Ferox fuel tablets? Has anyone tried them?

    Supposedly they help remove carbon deposits from your engine... Ferox is a fuel additive. It was developed by Wesley Parish in 1985 from work done on experimental burn rate modifiers for solid rocket propellant systems used in the aerospace industry. Ferox was originally designed to lengthen...
  13. Z

    Synthetic SAE30/10w-30 vs Synthetic 5w-40

    What would be your take which oil will do better in a turbocharged Audi V6 that is daily driver but also sees track time with oil temperatures hitting 280F. Right now I am running GC and have pretty decent results with it. When compared with UOA's of people mostly running M1 0/5w-40 looks about...
  14. Z

    best oil for 1980 Porsche 911 SC?

    Friend of mine has this air cooled 911 that he uses as a track and fun weekend car. Currently he runs Castrol gtx 20w-50. He has been experiencing some overheating issues lately. Would switching to syn oil help him out with lowering his engine temperatures. I was thinking he should try...
  15. Z

    Why UOA is not a best way to measure actual wear

    This pretty good article explains that Ferrous Density is much better test showing total engine wear, rather then UAO that only captures wear particles within particular size range. Understanding Ferrous Density by Ashley Mayer, Noria Corporation Ferrous density is the density of ferrous, or...
  16. Z

    GF-4 vs GF-5 oils, good info

    Here you can find main performance differences between two standards and what that means in practical terms: http://www.gf-5.com/the_story/performance/
  17. Z

    GC 0W-30, 5200 miles, 2001 Audi S4 , 2 track days

    Looks like GC did just fine despite track abuse (11 track sessions 20min each) that saw oil temps in 270-280F range under full boost and rpm mainly in the 4000-7000 zone Oil was changed just before track event in September and then served another 5K miles of normal/spirited driving and lots...
  18. Z

    Cool video for BITOG newbies

    Great Video Part1 Great video Part2 Engine Lubrication Another one Great video Part2
  19. Z

    auto-rx cold temperature properties?

    so I was changing the oil in my car over the weekend. I run GC with 4oz maintenance dose of auto-rx. Oil and auto-rx were sitting in the basement of my condo building(where temperature is about 45-50F). When I picked auto-rx bottle I was surprised that there was no sound of liquid moving...
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