Ok to use 5w30?

[TURBO2GO]

Hey guys I have 18 quarts of mobil 1 5W30 in my basement that's been sitting for a few months. Is this too thin to use now for a track event on a supercharged motor? i thought it may be ok because it's fresh and synthetic? If you guys say no I'll go buy 10-30 or 0-40. I'm heading off to WGI in an hour and need to decide. Also the best oil filter I found locally was an $8 Bosch, I bought it then thought twice and got one from the dealer for $15. Is it really better? Man the new ones are TINY!! I mean the Bosch is already small but the Acura one is even shorter. The hole spacing is different.

 

[Hrant]

Dave, since you are running in the putzing promenade group :tongue: do you really need an oil change now?

Otherwise it should be fine; but 10W-40 is better if the ambient temps are going to be high and you will be in the VTEC RPM range for most of the track session - which I doubt.

 

[dquarasr2]

Dave, since you are running in the putzing promenade group :tongue: do you really need an oil change now?

Otherwise it should be fine; but 10W-40 is better if the ambient temps are going to be high and you will be in the VTEC RPM range for most of the track session - which I doubt.

Oh, man, that is cold. Oh, so cold.

 

[TURBO2GO]

Oh, man, that is cold. Oh, so cold.

He's just a jealous little bitch because of a the God given driving talent I have...

 

[Hrant]

Oh, man, that is cold. Oh, so cold.

Read this?

Correction... cannot get tire here on time. I looked at the tech form and it says NOTHING about patched or plugged tires. I am in the slow run group and it says "tires must be adequate for 80 MPH".

OK, I am going to go with that unless someone here really objects. I will make sure the patch is done by a competent person according to RMA specs.

As for

He's just a jealous little bitch because of a the God given driving talent I have...

Easy there cowboy, there is a line between smack talk and "little b$#*h" that I don't cross. I know you meant it in humor but it is not in my syntax :wink:

 

[dquarasr2]

Read this?



As for




Easy there cowboy, there is a line between smack talk and "little b$#*h" that I don't cross. I know you meant it in humor but it is not in my syntax :wink:

Of course we know that ALL of this is in good fun.

Actually I got a good chuckle from "putzing promenade group" and not needing VTEC.

 

[TURBO2GO]

Hey Hrant, meant in fun, sorry if it upset you.

 

[Hrant]

No worries. So how did the 5W-30 old oil do? Did you see any white smoke from the exhausts :biggrin:

And the tires .......... do tell :wink:

 

[nsxtasy]

According to the NSX owner's manual and service manual, 10W30 is the recommended engine oil viscosity at temperatures of -2F and above, and 5W30 is recommended at temperatures of 36F and below.

 

[TURBO2GO]

Re: OK to use 5w30?

According to the NSX owner's manual and service manual, 10W30 is the recommended engine oil viscosity at temperatures of -2F and above, and 5W30 is recommended at temperatures of 36F and below.

Thanks Ken, but that is also conventional oil and not full synthetic. Anyway I talked to a real oil engineer at Mobil that helps develop oil for F1 engines and he said 5W30 Mobil1 in a supercharged NSX motor will work great. He did not recommend anything in the 40 weight range.

Hrant the patched tire was just fine. The tire place pulled out the plug, cleaned it up, installed the patch, did a road force balance.

1400 miles and 4 track days later my car did not use an ounce of oil or lose a half PSI of air in the tire. Car ran smooth and balanced in a group of F430's, Challenge Stradales, GT-R's, Viper's, Exiges, Z06's and ZR1's. I literally had the slowest car out of 130 cars at this HPDE. It was a crazy collection.

 

[Hrant]

Good to hear all worked on the cheap :tongue:

As for being the slowest, don't worry, speed will come with seat time; you have the car to keep up.

The 40W viscosity will be helpful if you are tracking in summer where the temps hit 90+F. If you have an oil temp or water temp, then you can appreciate the why :wink:

 

[TURBO2GO]

Re: OK to use 5w30?

As for being the slowest, don't worry, speed will come with seat time; you have the car to keep up.

I didn't say I was the slowest, I was just saying in this group of cars, mine was the slowest (unbelievably).

I had a great teacher who made me go slow for 3 of the 4 days. He told me right away he did not want to see me make the same mistake twice. I just tried really hard to listen and follow his instructions and I could care less who and how many passed me. I wanted to have no one behind me so I could concentrate on my lines.

Funny thing is by the last day I was passing all those same cars that were passing me days before. He said I was one of his best students ever... which meant a lot coming from a guy that had been teaching for 20+ years. He really taught me a lot. Probably more than all my 6 previous events combined. He was awesome. Klaus Hirtes.

 

[CL65 Captain]

Re: OK to use 5w30?

I didn't say I was the slowest, I was just saying in this group of cars, mine was the slowest (unbelievably).

I had a great teacher who made me go slow for 3 of the 4 days. He told me right away he did not want to see me make the same mistake twice. I just tried really hard to listen and follow his instructions and I could care less who and how many passed me. I wanted to have no one behind me so I could concentrate on my lines.

Funny thing is by the last day I was passing all those same cars that were passing me days before. He said I was one of his best students ever... which meant a lot coming from a guy that had been teaching for 20+ years. He really taught me a lot. Probably more than all my 6 previous events combined. He was awesome. Klaus Hirtes.

Dave, have you installed the KWs yet?

 

[TURBO2GO]

Re: OK to use 5w30?

Dave, have you installed the KWs yet?

No. I don't have the top hats yet. Waiting to get word from KW. The guy that knows in Germany has been on vacation.

I am sure that will make the car feel completely different.

 

[nsxtasy]

that is also conventional oil and not full synthetic.

Not true; that viscosity recommendation applies regardless of whether it's conventional or synthetic oil. However, it's for the stock engine, and I have no idea whether the viscosity needed for one with forced induction is any different.

 

[TURBO2GO]

Not true; that viscosity recommendation applies regardless of whether it's conventional or synthetic oil.

I feel a lot more comfortable knowing there is fresh synthetic in the engine. Conventional oil just doesn't have anywhere near the properties of synthetic, I will take my chances with 5W30 Mobil1 over 10W30 conventional oil any day. From what I have gathered, the biggest fear is oil breaking down from heat. Synthetic does not break down like conventional oil does, by a long shot. The push for thicker oil is to keep it from breakdown, but thicker oil actually does not penetrate certain areas of the motor like a thinner oil does and causes MORE damage. As explained to me by the engineer, the thinner viscosity of the 5W30 is actually a benefit, so long as there is no thermal breakdown.

If I was using conventional oil I would stick with 10W30.

 

[Honcho]

Both 10W30 and 5W30 will have the same thickness at a normal engine operating temperature of 100C. The only difference is when you shut off your car, the 5W30 will get thinner than the 10W30 when the oil cools down. This is beneficial for startup protection, since the cold oil will flow better through the engine passages. However, using a thinner cold oil like a 5W30 or 0W30 means that you must make sure to bring your oil up to normal temp before subjecting the engine to hard loads because the super-thin cold oil may not be able to generate the required oil pressures at high RPM. Remember, oil takes longer to warm up than water, so don't just go by your water temp gauge.

So, 5W30 or even 0W30 will work just fine in your NSX. Just make sure to get the oil hot before jumping on the gas.

 

[stuntman]

Thicker oil also 'floats' the main and rod bearings better by increasing oil pressure -which is important for track use and especially FI use. A lot also depends on the tolerances of the motor, loads placed on the motor (FI, high revs, mis-shifts, etc...), environment the motor will be in, etc...

 

[LJSB]

A lot also depends on the tolerances of the motor

There it is.

 

[nsxtasy]

I feel a lot more comfortable knowing there is fresh synthetic in the engine. Conventional oil just doesn't have anywhere near the properties of synthetic, I will take my chances with 5W30 Mobil1 over 10W30 conventional oil any day. From what I have gathered, the biggest fear is oil breaking down from heat. Synthetic does not break down like conventional oil does, by a long shot.

You are correct; synthetic oil is more resistant to breakdown when hot than conventional oil is. It also has better flow characteristics when cold. That's why I use synthetic oil in all my cars, including the NSX - in the viscosity recommended by the car's manufacturer (i.e. 10W30 synthetic in the NSX, 5W30 in the other cars).

5W30 or even 0W30 will work just fine in your NSX.

I'll stick with the 10W30 recommended by the folks who designed and built the car. There was obviously a reason that they recommend 10W30 for the NSX, while recommending 5W30 for all their other cars. I'll stick with their recommendation.

 

[Honcho]

I'll stick with the 10W30 recommended by the folks who designed and built the car. There was obviously a reason that they recommend 10W30 for the NSX, while recommending 5W30 for all their other cars. I'll stick with their recommendation.

I use Mobil 1 10W30 in my NSX.

 

[Track Addict]

<- runs 10W30 Amsoil in my car with stock filter. no issues whatsoever in northern CA high heat

 

[lightguy]

10w-xx is too thick at start up.
5w-xx is too thick at start up.
0w-xx is too thick at start up. But the best available choice for a daily driver.
For dedicated track use track use; thicker is better to a reasonable point. Its all about how the oil operates at elevated temps there.

Use the 5w-30 up.