High Revs and GC/30-Weight Oils

[insomniac]

Someone told me that if you're on a "thin" oil (30-weight or less), never hold your revs above 3K RPM for like more than 15, 20 seconds.

Ridiculous, I believe...but...decided to put this out and see what you guys have to say.

 

[jsharp]

Someone needs to call all the Nascar engine builders and let them know. No wonder they have so many failures...

 

[reb03]

That's close to the most absurd thing I've ever heard.

 

[Quattro Pete]

Ask that person to justify their statement. I want to laugh some more.

 

[Craig in Canada]

I guess no one with a 4cyl can ever drive on the highway.... Most I've ever been in turn around 3k at 60-65mph unless they have a serious overdrive.

 

[kapps]

Quote:

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Someone needs to call all the Nascar engine builders and let them know. No wonder they have so many failures...

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Exactly

. It's amazing how thin an oil they run those engines on.

 

[ThirdeYe]

lol, where did you hear that? my car's cruising speed is above 3k on the highway and I ran 5w30 Havoline DS for over 4300 miles, mostly highway above 3k and wear came back below average.

 

[Dad2leia]

Guess that would also explain why my Saturn used after I did that 15 minute high rev run on the highway, just to see how good Amsoil's 60 weight racing oil would protect under serious stress...

 

[Saab9-3]

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I guess no one with a 4cyl can ever drive on the highway.... Most I've ever been in turn around 3k at 60-65mph unless they have a serious overdrive.

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My saab just rolls over at 2200 rpm at 105km/h. Its a little 2.0L 4 cylinder.

 

[teaelle]

my civic revs 4300rpm at 80mph, so i guess i have to use 15W-50 oil

LOL

 

[Craig in Canada]

Quote:

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My saab just rolls over at 2200 rpm at 105km/h. Its a little 2.0L 4 cylinder.

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...with a turbo...

 

[Saab9-3]

Quote:

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Quote:

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My saab just rolls over at 2200 rpm at 105km/h. Its a little 2.0L 4 cylinder.

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...with a turbo...

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My 1972 MGB revs at 2800rpm at 100km/h... no turbo is that, and its a 1.8L

 

[itb76]

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my civic revs 4300rpm at 80mph, so i guess i have to use 15W-50 oil

LOL

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I thought my VW was bad. 3300rpm @80mph. It really needs a sixth gear.

 

[insomniac]

Hehehe...I'll show him yr replies.

 

[craigq]

Quote:

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Quote:

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Quote:

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My saab just rolls over at 2200 rpm at 105km/h. Its a little 2.0L 4 cylinder.

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...with a turbo...

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My 1972 MGB revs at 2800rpm at 100km/h... no turbo is that, and its a 1.8L

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That's 2800rpm with the electric overdrive engaged

My 2007 Toyota Yaris Sedan w/automatic/overdrive/lockupTC revs at ~2500rpm at 100kph, no turbo, and a wee 1.5L L4

 

[gedcruise]

Your MGB must have OD. Mine doesn't, and turns 3K at more like 90 KPH, or 54 mph. 17.9 mph/thousand in fourth direct.

 

[gedcruise]

Your MGB must have OD. Mine doesn't, and turns 3K at more like 90 KPH, or 54 mph. 17.9 mph/thousand in fourth direct.

 

[Saab9-3]

Yup, good ol OD on my B. Love it.

 

[gedcruise]

My mouse must have been in OD, as I didn't intend the double post.
A bit OT, but what oil do you use in your B? I've always used a 10W-40 dino, and the engine neither leaks nor consumes noticeably.

 

[Saab9-3]

I was using mobil 1 15w50, it didnt like it. So I have gone back to 20w50 Castrol GTX dino. Love it, so quiet minimal oil leaking and zero buring of oil.



I ran RP 20w50 for 1 month, and what a waste, engine ticking away, just awful stuff, Ill never touch RP again.