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Generation III Internal Engine
1997-2006 LS1 | LS6
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Old 03-20-2011, 03:48 PM   #1
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Default Is this 5W 40 Shell Rotella too thick for me?

This is what oil I have been running in my stock 01 LS-1 that is making 402 rwhp with bolt ons.

http://www.shell.com/home/Framework?...t6_detail.html

Is this a good choice?

What are you guys running?
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Old 03-20-2011, 03:57 PM   #2
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thats for diesels.use the 5/10-30w for hp.these engines are designed so good thats all they need.consider penz plat or mobile syn.
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Old 03-20-2011, 04:07 PM   #3
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I recommend giving this site a good long read. I was browsing these forums and someone else posted the link so I can't take credit


www.bobistheoilguy.com

It should answer all your questions about oil weight and what you can use. Personally I'm going to a 0W20 full synthetic soon myself.
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Old 03-20-2011, 04:46 PM   #4
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I ran castrol syntec 5w-40. I ran it for maybe 2 years and changed oil every 4,000 miles. I never had any problems with it. Good oil pressure, no oil consumption issues or anything. I just switched to syntec 5w-30 and no issues at all.
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Old 03-20-2011, 07:01 PM   #5
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It should answer all your questions about oil weight and what you can use. Personally I'm going to a 0W20 full synthetic soon myself.
I don't care what anyone on the internet says. That 0w cold weight is WAY too thin for these engines. Comp Cams won't even warranty a failed camshaft if you use an oil that thin, and I've tore down tons of engines using that thin oil and see lots of aged bearing wear.

Bare minimum, a quality 5w30 needs to be used. I would ONLY recommend a 0 cold weight if you're in sub zero temperatures for most of the year.
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Old 03-20-2011, 07:09 PM   #6
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Hi,
i agree with txz28ls1...i like things a little thicker for lubrication purposes and increased oil pressures. Very little return on high $$$$$$$$ synthetic.
Keep things changed on a regular basis and you should not have any issues.
Remember oil doesn't wear out!!!it only has contaminations from fuel/wear/etc.
Solid lifter/flat tappet cam vehicles need special additives which is available from only three (3) manufactures. Check out the latest report from melling 2011. Higher mileage engines need a thicker oil as the clearance on the bearings increases. Newer engines can benefit from thinner oils due to tighter clearances. Good luck and have a blessed week.jim
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Old 03-20-2011, 08:18 PM   #7
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Quote:
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Hi,
i agree with txz28ls1...i like things a little thicker for lubrication purposes and increased oil pressures. Very little return on high $$$$$$$$ synthetic.
Keep things changed on a regular basis and you should not have any issues.
Remember oil doesn't wear out!!!it only has contaminations from fuel/wear/etc.
Solid lifter/flat tappet cam vehicles need special additives which is available from only three (3) manufactures. Check out the latest report from melling 2011. Higher mileage engines need a thicker oil as the clearance on the bearings increases. Newer engines can benefit from thinner oils due to tighter clearances. Good luck and have a blessed week.jim

Jim, the only reason i tried running 5w-40 is because you read alot of oil consumption issues, ticking and valvetrain noises with members on here running 5w-30. I mostly seen that with guys running Mobil 1.(just noticed thats what they were running btw..) so i thats why i thought i would give this a try and see if that might help. And i never had a problem at all. Car ran fine. But like i said, i switched to 5w-30 and try to change oil every 6 months now rather than every 4k miles.
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Old 03-21-2011, 01:04 PM   #8
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I run Amsoil 5W-40 European Car Formula. Have been for years. I am worried about running 5W-20 in my Expedition, but that is the approved weight for the vehicle.
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Old 03-21-2011, 02:43 PM   #9
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Rotella T6 is good stuff, lots of good info on that oil website, from virgin samples to used high mileage samples. It holds great pressure and seems to deal with heat pretty well. From what I've seen on it, it's great for anti-wear and has a stout additive package.

I tried running standard 5-30 conventional and synthetic and just didn't like the noise and pressure I got with them. I'm at 109k miles and the 5-40 seems to be just right.
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Old 03-21-2011, 03:00 PM   #10
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I run Amsoil 5W-40 European Car Formula. Have been for years. I am worried about running 5W-20 in my Expedition, but that is the approved weight for the vehicle.
I've been running the same 5-40 Amsoil for about 5-6 years now, it's been great. Very little consumption, nice pressure. I ran the Mobil 1 5-30 way back before, saw a bit more consumption with it and the Bobistheoilguy folks reported it being very thin for a 5-30, almost a 0-30, though from my understanding it's since been reformulated.

I would not run a 0-20 on these cars. Or any car. I'm very skeptical about the use of extremely low viscosity oils, IMHO manufacturers recommend them to help CAFE numbers and not long term durability of the engine.
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Old 03-21-2011, 07:33 PM   #11
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That's great oil. The reason it's popular with diesels is because it works. The Rotella line is a great offereing and if you can find the right viscosity your engine will have reduced wear. These oils seem to be a bargain compared to other synthetics. Check out bobistheoilguy and do some research. I think Blackstone labs was the place to get your oil analyzed if you want to see for yourself.
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Old 03-21-2011, 07:39 PM   #12
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I'll tell you one thing I noticed going from 5-30 weight to 10-30 the engines run much quieter at cold start.
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Old 03-21-2011, 08:54 PM   #13
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Depends on if someone has tried it in an LS engine. I've been using Mobil 0w-40 for quite a while and love it. No problems either. Mobil even says on their website that it has done tests in cars that are speced for 5-30 and have not seen problems. (If you want to believe their website, but my experience, and other ppl's agree with the claim.)

BTW, the 0w is on a totally different scale than the 40 part. When your engine is running at operating temps, the 0w will not really factor in. bob is the oil guy is an excellent site with good info.
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Old 03-21-2011, 09:43 PM   #14
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My 408ci motor in my C5Z burned 0 and 5 weight oil like water evaporating on a hot sunny day. I'm running 5/40 Rotella Syn and not a drop lost in two oil changes.
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Old 03-22-2011, 11:07 AM   #15
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Quote:
Originally Posted by NHRATA01 View Post
I've been running the same 5-40 Amsoil for about 5-6 years now, it's been great. Very little consumption, nice pressure. I ran the Mobil 1 5-30 way back before, saw a bit more consumption with it and the Bobistheoilguy folks reported it being very thin for a 5-30, almost a 0-30, though from my understanding it's since been reformulated.

I would not run a 0-20 on these cars. Or any car. I'm very skeptical about the use of extremely low viscosity oils, IMHO manufacturers recommend them to help CAFE numbers and not long term durability of the engine.
Yeah, I spent a couple of hours reading up on bobistheoilguy about the Mod motors spec'd for 5W-20. Seems like it is ok. I will probably go with a decent synthetic in that weight to help maintain weight. I am an Amsoil dealer so I can get it reasonably priced, just on the fence about weight.

I have run the 5W-40 Amsoil in my Camaro for years as well, and in my Dad's 2004 Sierra for the same period.
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Old 03-23-2011, 08:59 PM   #16
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15w40 is whati run 140,000 miles later. all is well.
plus its $10 cheaper as well
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Old 03-24-2011, 04:27 AM   #17
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Can't go wrong with rotella its a very good deal.
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Old 03-27-2011, 09:37 AM   #18
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Quote:
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15w40 is whati run 140,000 miles later. all is well.
plus its $10 cheaper as well
X2...this is what i run in all my rides.
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Old 04-06-2011, 09:11 PM   #19
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OK I am sticking with the Rotella T6 I run it in my GSXR 1000 sport bike and we run 10K- 15K rpms on the track for 20 minute sesions. If the tach dips below 10,000 rpm's you are lugging it and your buddy is going to pass you.
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Old 04-06-2011, 09:11 PM
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