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Thread: What Brand Oil Do you Use? What is Best?

  1. #61
    BMW Master bawareca's Avatar
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    Higher grade oil(50,60) is recommended for engines that run on the rich side and the oil gets diluted by the unburnt fuel that is left in the boundary layer close to the cylinder walls .Mine and PureEvo's engines definitely qualify for xxW50,xxW60 oil.
    BMW M engines from 1980's to today despite of being high-strung engines use Castrol TWS 10W60 as per the factory specs.

  2. #62
    Track Whore Pure EvoIX's Avatar
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    Quote Originally Posted by Jack Olsen View Post
    Don't modern Vettes come stock with a dry sump system?

    Is there any kind of baffled pan or Accusump-type system for the Evo?

    I've never learned about most of this, since the air-cooled 911s had (dual-pump, 12-quart) dry sump systems from the beginning. (Although the water-cooled ones have a less awesome compromise system, like Todd mentions.)

    And even without a pan at the bottom, I put in a pump with additional inlets at different corners of the case. But then, Zhong is faster than me. So I can't say I'm bragging. Just not blowing up.
    I did WSIR, on pace for a 1:24 lap. Exiting T8, about to go into T9 and rod exited the bottom of my oil pan. It was a Buschur Baffled oil pan and i also had a 3qt mechanical not electrical accusump running as well. I was on stickier 25540/17 Hankook TDs. That helped with the increased grip/cornering Gs and the bearings didnt like that. I was in full counter trying to save the damn thing...while i see fire coming out of my hood. I knew it was an oil fire. Held slide for 3-4s...then went straight off into hay bales as i ran out of track. decreasing radius turn ftl. Oil got onto tires and had no steering. Surprisingly my front bumper and lip survived and didnt get crunched. Ended up putting it out with my newly installed fire extinguisher. I lucked out on that one.

    I now have everything short of drysump. I have a wetsump to replace the dead buschur baffled oil pan.
    Zhong (Evo IX) | Angry Panda Racing

    1:53.396 @ BRP CW13 - 11/14/13
    1:47.2xx @ Laguna Seca - 11/28/10
    2:03.026 @ Thill CCW Bypass - 12/20/14
    2:05.100 @ CVR CCW - 1/16/11
    1:58.151 @ CVR CW - 5/5/13
    1:25.56x @ WSIR - 10/13/13
    1:23.128 @ SOW CW - 7/27/14
    1:22.2xx @ SOW CCW - 7/26/14
    1:46.0xx @ ACS Roval - 11/23/14
    1:11.299 @ ACS Infield - 5/18/14

    Fastest Limited/Mod Class Evo in Time Attack at WSIR
    2nd Fastest Limited/Mod Class Evo in Time Attack at BRP 13CW

  3. #63
    Sir flink
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    Blowby will definitely increase the oil consumption. My BMW engine-before-last had worn out cylinders and was burning a gallon an hour. The pistons had tremendous amounts of carbon buildup and it was all in a double-lobe shape under the intake valves, so the oil was clearly getting in via the air intake.

    I got sick of it and deleted the stupid PCV system - turned a catch can into an oil separator to vent the crankcase to atmosphere and to drain the oil back into the sump. It worked very nicely at the one event where I've used it.

    Regarding oil pressure... oil pumps wear out. My pressure was reading dead zero at idle with hot oil. Removed the pump and measured the rotor end clearance and it was 30 thou, lol. I measured a couple of used-on-the-street pumps and they're 2 thou. So that pump had a massive leak between the high and low pressure sides.

    Measuring the rotor end float is very easy - take the two pump halves apart, lay a straightedge over the housing surfaces and poke feeler gauges under it. I'd say anything over two thou needs to be addressed. People have sanded the housings down by hand or get it machined or get a new pump...

  4. #64
    Senior Member fatbillybob's Avatar
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    Quote Originally Posted by redtopz View Post
    The corvette LS factory engines use 30 weight oil. So that's what I have been using for 7 years. As you know I raced my original stock LS6 engine all through the last 7 years with no issues and no rebuilds. The key is continuous oil pressure and keeping the oil from over heating. I had a dry sump for half of those years. If my engine suffered from low pressure, I would prefer to upgrade the pump rather than run a higher viscosity oil.
    Interesting! I approach the problem differently. I say give the car what it asks for. I'm still on my original LS6 motor and it has about 13k miles. I use no catch cans and blow no oil. As an example I raced at Indie Motorsports park and then at BRP for the SCCA Majors weekends and added no oil to my engine. The oil level is still at max on the stick! The factory specs 10-30W , like you say, but the car is operating as a street car at about 200*F with no catch cans from GM. As a racecar it is operating at about 280*F and the 30W viscosity falls as does the oil pressure. So I use 20-50W racing oil with the extra wear protecting Zinc. I use no oil, need no catch cans, have good racing oil pressure at all times and still run 1 qt over per GM recs for racing this wet sump motor. Look at this viscosity vs. temp chart and it gives validity to my crazy ideas. I know I don't go as fast as you and Oli hence running my engine as hard but I'm not exactly taking a Sunday drive either. You can see by the graph that the viscosity in cst is nearly the same for the operational temps of street vs. race for 10-30 vs. 10-50.
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  5. #65
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    Pure -

    Your problem is NOT what oil you use. Your problem is that you drive a heavily modded Evo with a big-ass turbo, tuned on the ragged edge. You are pushing 400+ awhp out of a 2-liter interference engine. They blow up. That's just the way it is. Been there, done that (5 heads, 4 blocks, 3 turbos, 2 gearboxes, yada, yada, yada).

    The way to track an Evo is with modifications only to the suspension, brakes and tires. Leave the engine and turbo alone. The stock units will last forever . . .

    Oh, don't forget safety equipment. Racing seat, 6-point harness, cage or at least a rollbar, HANS device, fire extinguisher, at a minimum. Don't scrimp on safety equipment, the life you save may be your own.

    Quote Originally Posted by Pure EvoIX View Post
    That is my point...I am paranoid. lol. I change my oil pretty much every 1-1.5 hours of track time aka every 2 events and probably not more than 1000miles.

    I am on my 5th engine.. Every event i probably only do 30-40min of track time if that. I would say my last one lasted 4 track hours if that. In 2012 was my best year. Lasted from end of October 2010 - March of 2012 (2.5yrs). It lasted 2.5 seasons with no major issues. I would say ~40-50 track hours.

    April 2013-Present (3 engines)
    -April 2013 - April 2013 (weekend) (engine rebuild)
    -May 2013 - Oct 2013 (5mo) (new shortblock)
    -Nov 2013 - March 2014 (4mo) (new head)
    -May 2014 - Present

    lol.
    Last edited by Richard EVO; 05-12-2014 at 11:29 PM.
    The deposed former Sheriff of trackHQ . . .

    2006 Porsche 997 Carerra Coupe 6-MT - daily driver
    1992 Honda (Acura) NSX 5-MT - classic investment I couldn't resist and occasionally drive
    2004 Honda S2000 AP2 6-MT - track day car
    2006 Mitsubishi Lancer Evolution IX MR 6-MT - when I need a backseat, 4-doors, or a real trunk, and still want to haul ass . . .

  6. #66
    Track Whore Pure EvoIX's Avatar
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    I have bucket seat. I have 6pt harness. I currently have a 4pt rollbar, soon to be full 6pt cage, hans device, fire extinguisher, helmet, socks, 3 layer firesuit, balaclava, gloves. I just need some nomex underwear, nomex shoes (expensive). I need new balaclava too.

    Yeah, I am thinking of lowering power by lowering boost another 3psi. so 22psi and 25psi.
    Zhong (Evo IX) | Angry Panda Racing

    1:53.396 @ BRP CW13 - 11/14/13
    1:47.2xx @ Laguna Seca - 11/28/10
    2:03.026 @ Thill CCW Bypass - 12/20/14
    2:05.100 @ CVR CCW - 1/16/11
    1:58.151 @ CVR CW - 5/5/13
    1:25.56x @ WSIR - 10/13/13
    1:23.128 @ SOW CW - 7/27/14
    1:22.2xx @ SOW CCW - 7/26/14
    1:46.0xx @ ACS Roval - 11/23/14
    1:11.299 @ ACS Infield - 5/18/14

    Fastest Limited/Mod Class Evo in Time Attack at WSIR
    2nd Fastest Limited/Mod Class Evo in Time Attack at BRP 13CW

  7. #67
    RaceTape Ninja Force McCocken's Avatar
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    I think a lot of us have been there...adding power to a car to the point where you realize you are chasing a ghost in sacrifice of cultivating driving skill. I know I started enjoying track days more when I stopped trying to make big, reliable power and went back to a more stock, n/a configuration. I spent my time at the track problem solving my technique over troubleshooting the car and it allowed my to be more relaxed and focused. Not surprising, I not only started lowering my times, rebuilding my confidence, but I also had more money in a lower budget to do more events. Funny how that works.
    Pure EvoIX and bawareca like this.
    Yer pal,
    Force

  8. #68
    Track Whore Pure EvoIX's Avatar
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    Funny enough, it is what the car wants to make. We are not forcing it to make that kind of power. I used to be tuned on 91 and made 24psi...now im on E85 at low boost is 25psi. I feel that is conservative, but I guess there is no harm ratcheting it back down to 20 and 22psi. I am fine with 380-400whp. Anything less than 20psi and its gonna be less boost than factory...haha.

    But I do get your point. Work/worry on driver instead of getting everything out of car power wise and then worry about car.
    Force McCocken likes this.
    Zhong (Evo IX) | Angry Panda Racing

    1:53.396 @ BRP CW13 - 11/14/13
    1:47.2xx @ Laguna Seca - 11/28/10
    2:03.026 @ Thill CCW Bypass - 12/20/14
    2:05.100 @ CVR CCW - 1/16/11
    1:58.151 @ CVR CW - 5/5/13
    1:25.56x @ WSIR - 10/13/13
    1:23.128 @ SOW CW - 7/27/14
    1:22.2xx @ SOW CCW - 7/26/14
    1:46.0xx @ ACS Roval - 11/23/14
    1:11.299 @ ACS Infield - 5/18/14

    Fastest Limited/Mod Class Evo in Time Attack at WSIR
    2nd Fastest Limited/Mod Class Evo in Time Attack at BRP 13CW

  9. #69
    RaceTape Ninja Force McCocken's Avatar
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    Yes. Remember, these are supposed to be fun. Worrying about the car in the ways you are isn't fun, it's exhausting and expensive. KISS, figure out the important stuff.
    Pure EvoIX likes this.
    Yer pal,
    Force

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