Which one would you choose assuming 3K mile-5K mile oil change intervals with approximately 2 track events on per oil change. Will want the most power without over sacrificing durability of the oil. Looking at...

Motul 300V Double Ester 5w-30 for power. Still carries a 3.6 HTHS...

http://turbofrogperformance.com/PDF_files/300V%20Power%20Racing%205W-30%208255%20(GB).pdf

Motul 300V Double Ester 5w-40 for power and durability. May be a bit thick though as it has a huge 4.5HTHS like Redline that ran very thick. Sacrifice in power for unneeded added protection or a good safe one to go with?...

http://turbofrogperformance.com/PDF_files/300V%20Power%205W-40%208256%20(GB).pdf

There's always the tried and true and factory warranty backed Ester based Etech 0w-40 street oil. No HTHS specs but it meets 503 and 502 so >3.5...

http://turbofrogperformance.com/PDF_files/8100_E-tech_0W-40.pdf

Let me know your thoughts. Thinking about changing from M1 0w-40 that has been a terrific oil though. Maybe for the short intervals a changes from M1 is unneeded? Im wondering if it might not be as the M1 runs a bit light and the 300v 5w-30 a bit thick so they might be a wash as far as hp is concerned and they likely have similar protection for the intervals i'll be using or not? Appreciate any insight.

M1 0w-40...

http://www.mobil.com/USA-English/Lubes/PDS/GLXXENPVLMOMobil_1_0W-40.asp


cheers! Mike

 

Viscosity #s are practically identical to the 300V 5w30 except it has higher HTHS and a higher flashpoint. No reason to use Motul over the 5w30 redline IMO.

How about GC 0w30? Vis @100 is 12.2 . . . . less than 0w40, more than 5w30. Group IV and V basestocks too. HTHS unknown. Also carries 503 rating.

Dave

 

Mobil 1 0w-40, it'll thin like crazy in your app. You want a thick oil that will keep your car going on the street w/o a rebuild/excess wear. Honestly, I think you'd get best results with Syntec 5w-50. My mechanic uses it in the Club Porsches and his S6 w/like 25lbs. Still the original turbo. He says it keeps OP better between warm-up and race start better than...umm... Mobil 1 15w-50. jmo. ftr Mobil 1 5w-50 is the best selling grade in Europe, not a typo. Ask your Euro non-Motul buddies, I bet a ****load of then run the Syntec. I know for a fact the awesome PTG M3 Racer uses it, they could use ANYTHING inc the Castrol TSW Motorsports 10w-60.

<a href="http://photobucket.com" target="_blank"><img src="http://i15.photobucket.com/albums/a364/AudiJunkie/Bmw.jpg" border="0" alt="Photobucket - Video and Image Hosting"></a><ul><li><a href="http://theoildrop.server101.com/ubb/ultimatebb.php?ubb=get_topic;f=1;t=015486">Redline 5w-40</a></li></ul>

 

but for some reason the M1 15w-50 seems to be a little hidden oil that is actually running very similar to 5w-50 oils in the US people are used to. I dont know why but M1 seems to get the job done but just runs a bit light which I guess is good for 3K mile folks like me. With your recs im thinking screw it and going to go with double ester 5w-30 race oil. It has less viscosity yet is more stable and has same HTHS. Perhaps more power with an equally stable oil?

 

and i'm looking for something more. If you divide the cst at 100 with HTSH you get similar numbers with them. Redline was my baby years ago but the 5w-40 of Redline was so damn thick you would have thought it was at least 20-50 oil. I like you are thinking went off the numbers and the Redline is a lot thicker than you can imagine. I never tried the 0w-30 only bc I never thought it would be appropriate but knowing now what I do about Redline, I might try it. They rock, but they seem to be thick as hell. Still have cases and cases of it at the house. If youre interested let me know and i'll ship it to you. At this point i'm thinking if you get it close to good than who gives a crap, but the MOtul 300v race 5w-30 is thinner while providing the same 3.6 HTHS so if it'll give me some more horsies, i'm all aboard. **** GC anyways. It's for fanbois Just kidding.

cheers! Mike

 

The RL 5w40 is actually their 5w30 + VIIs . . . hence why the viscosity index is so high and lack of substantial performance increase over the 5w30.

Once my stash of green GC runs out (5 quarts left), i'll probably be switching to RL 5w30 and am considering running a RL 5w30/5w40 blend. I hear ya on the 5w40 being thick . . .

A4NCAR ran the RL 5w30 on his B6 A4 for quite a while @ extended intervals . . . . had very good results and low wear numbers.

I've always found Motul oils to have low flashpoints. For instance the 300V 5w30's /5-w40 flashpoint is 424F/420F whereas the RL 5w30 is 486 . . . I think it might have to do with the type of ester Motul uses versus RL (diester vs polyol ester). Either way, 62F is pretty significant and I believe that it'd make a difference esp in a turbo'd engine.

Anyways, RL is certainly more affordable @ $7/qt.

Dave

 

GC HT/HS is 3.5cP as required for A3/VW502, retains it too.Interestingly, Mobil 1 looses FP over use

 

after 122k of 10k intervals on Syntec 5w-50. Hard to beat the Syntec.

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that 12v doesn't have to deal with the extreme temps of a turbo though . . .

 

VIIs are bad mmkay?

Dave