Oil Wt s & Brands?

[mustanghammer]

Do you know why they make that recommendation?

The bearing surfaces in a rotary engine are very large and in order to maintain a good oil film they recommended thicker viscosity oil. As far as longevity is concerned my Prather IT7 engine lasted for 7 years using Amsoil and or Mobil 1 20/50. It died when an oil cooler line failed...was running real good that day too So, as far as synthetic oil is concerned, we have seen no problems with it. We also do not have functioning oil injection on any of our engines - we use 2 cycle oil and premix 100 to 1.

For sure, the best way to fight a dry start is to install an accumsump. My engine will have one in my STU car. In addition to having the bearings lubed at startup an accusump will prevent oil starvation on the race track. I installed an oil pressure light (yeah after I lost an oil line) and on occassion it flickers after abrupt manuvers.....like turn 5 at Gateway. All that said, I have yet to pull apart a dead street engine that had bad bearings. The housing were trashed but the E-Shaft and stationary gear bearings were fine.

[team-gpracing]

Hoping to revisit this. I am finally running out of the oil that I received from a sponsor a couple years ago and looking to start buying again. It's Amsoil 10-40 racing I believe (I don't have it in front of me). Doesn't look like they make it anymore.

Tom, how did the change workout?

I don't see anyone mentioning the zero weight...

Comments?

[tdw6974]

Hoping to revisit this. I am finally running out of the oil that I received from a sponsor a couple years ago and looking to start buying again. It's Amsoil 10-40 racing I believe (I don't have it in front of me). Doesn't look like they make it anymore.

Tom, how did the change workout?

I don't see anyone mentioning the zero weight...

Comments?

Well We made several changes (different engine builder) So we use Idemitsu racing oil http://www.idemitsu-usa.com/ We will use the 10-30 for winter storage then go to 20-50 for race season. Of course when changing weights you can't get all out so we phase in went to 20-50memorial day weekend at Watkins Glen. Of course test day on Friday we had Snow Sleet and Rain!! Then We did change oil again before July Sprints (but were unable to run) Then just ran at Pitt International Temps not too High(outdoor) and Stable water temps and oil temps and got some suggestions From Viper Team as how to get that even better! Zero weight makes me nervous LOL

[joeg]

Mobil 1 does make a 0-w50 race oil.

I bought a case (found it on-line), but it took forever to arrive.

Other than that purchase, Walmart's Mobil 1 15 W-50 5 qt juggs are a deal at $23.00.

[Matt93SE]

You rotary guys are nuts. Castrol GTX 5w30 in my stupid 4-banger, and it's never given me so much as a hiccup.

[joeracerx95]

You rotary guys are nuts.

Yes, and your point was?

[team-gpracing]

It's true.


Looks like the second vote for the Wal-Mart special. JoeG, what are you running for a car? Stock engine?

Tom, how much is the Idemetsu and is it hard to get?

[joeg]

IT prep to the max; no oil cooler but big aluminum race radiator--a HOWE--and an Accusump. 4 cyl. in-line 1.6 ltr.

Always used Mobil 1 but occassionally Brad Penn. Valvoline mineral race oil for break-in; Mobil 1 is great oil.

[tdw6974]

It's true.


Looks like the second vote for the Wal-Mart special. JoeG, what are you running for a car? Stock engine?

Tom, how much is the Idemetsu and is it hard to get?

Here is list of dealers from Idemitsu site. http://www.idemitsu-usa.com/h/32/dealers.htm Check with dealer close to you to save on freight. With Shipping etc Runs about $10 per quart.