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API SH 30 hello from new guy #5235363 10/09/19 10:33 PM
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sundy58 Offline OP
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Hello,

I bought a 1997 Itasca motorhome with a L29 454 engine. Roller tappets 290HP 410Torque. I have been looking at the "Chevrolet Motor Home Chassis Service Guide" that came with the MH. The 'preferred' oil above 40F is straight 30 weight SH oil. I live in deep south Texas or as we call it north Mexico, so the under 40F time is nearly nonexistent. The engine has 43,000 miles and has been sitting for several years.

Straight weight oils seem to be hard to find any more and I'm looking for some advice.

I see that Tractor Supply has a straight 30 SH in their Traveller brand, I see Valvoline racing oil but it is pricey.

I have lurked here for years and you guys have a wealth of knowledge, I just hope I don't get overwhelmed.

I suppose I should post my filter questions in the filter forum.

IMG_20191009_215055502.jpg
Re: API SH 30 hello from new guy [Re: sundy58] #5235369 10/09/19 10:39 PM
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Dyusik Offline
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I'd run HDEO in 15w40 and fuhggedaboudit.


95 Cherokee 190K DELO XLE 10W30, XG8
04 YZF-R1 20K Frankenbrew 20w50ish, XG7317
14 RX450h 44k STP SYNHM 10w30, WIX 57047
18 RAM 3500 5k DELO SDE15w40, DBL7349
Re: API SH 30 hello from new guy [Re: sundy58] #5235370 10/09/19 10:40 PM
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tundraotto Offline
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I second the HDEO 15W-40

Re: API SH 30 hello from new guy [Re: sundy58] #5235394 10/09/19 11:11 PM
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domer10 Offline
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Rotella Gas Truck.


2013Jeep Wrangler Sahara Unlimited
2001 Toyota 4Runner
20010 Harley Davidson Rocker
Re: API SH 30 hello from new guy [Re: sundy58] #5235396 10/09/19 11:13 PM
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Chris142 Online Content
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Plenty of straight 30 here still. Odd that something that new says a straight weight is preferred. A 15w40 would be even better than a straight 30.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: API SH 30 hello from new guy [Re: sundy58] #5235398 10/09/19 11:14 PM
Joined: Sep 2010
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4WD Online Confused
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Delo or Delvac in 15w40

Re: API SH 30 hello from new guy [Re: sundy58] #5235427 10/09/19 11:56 PM
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BlakeB Offline
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What about SuperTech HD-30? My local Walmart has it at $3.12/quart. It’s SN plus rated.

139DFA94-DAE3-4270-9A3A-891B8CE5C1B5.jpeg717E4A2B-DB3A-4F52-99B5-C95B77571D0B.jpegBB40544D-3BD0-4068-8E8C-1A1AC4D2E772.jpeg
Re: API SH 30 hello from new guy [Re: sundy58] #5235429 10/10/19 12:07 AM
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dogememe Offline
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SAE 30s are easy to find. O'Reilly stocks 2-3 depending on region. Walmart has Supertech as shown above. But no point in using that when 10w-30, 10w-40, and 15w-40 are readily available and you have more choices in brand.


2010 Ford Escape 2.5 ~100K Miles: Castrol Magnatec 5W-20, Wix Filter.
2001 Chevy Suburban 5.3 ~283K Miles: Unknown Oil, Filter.
Re: API SH 30 hello from new guy [Re: sundy58] #5235438 10/10/19 12:32 AM
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csandste Online Content
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Agree that 15w40 is the way to go. Oils have improved since the manufacture date.


2017 Kia Soul Plus-- VWB 5w30 (+ Harvest King Syn) 68,500 miles
Re: API SH 30 hello from new guy [Re: sundy58] #5235468 10/10/19 02:05 AM
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rubberchicken Online Content
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I am going to be the dissenter here- straight 30 is old school, and you would be better served with a 5w30 or 10w30/40 . My 1997 Suburban with the same L29 7.4, 4x4 w 4.10 gears recommended 5w30. You could even go a bit higher to a 15w40, but personally I would never run a straight 30.

Re: API SH 30 hello from new guy [Re: sundy58] #5235493 10/10/19 04:44 AM
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demarpaint Offline
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If it never sees temps under 40F 15W40 would be a good choice, although I would probably opt for something like TDT 5W40, or Delo XSP 5W40. Just in the event I decided to drive somewhere colder.


God Bless Our Troops

Re: API SH 30 hello from new guy [Re: sundy58] #5235608 10/10/19 08:01 AM
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ARCOgraphite Offline
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Id worry about the " sitting for several years" issue first. You are going to have many things to think about other than oil selection.

A decent HM 10w30 dino should do well. Just keep an eye on the Coolant and oil temp and idle oil pressure.

GM tappets have a designed bleed down rate for improved torque, you dont want to screw that up with incorrect KV100.

But this is a low HP BB not a mid HP gen one 350 so maybe OK.

Last edited by ARCOgraphite; 10/10/19 08:01 AM.

2019 VW Jetta S 6MT OCI#1 5885mi-Castrol Edge Prof? VW508+VW Service Filter; '17 Subaru Crosstrek CVT OC#7 52665mi-Castrol GTX Magnatec 5W20 + SOA Filter
Re: API SH 30 hello from new guy [Re: sundy58] #5235617 10/10/19 08:11 AM
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Audios Offline
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15/40, 20/50, 10/30. Find the cheapest brand name and don't worry about it.


2002 VW Golf TDI-T5 10/30
2007 Mercedes GL320 CDI- M1 0/30 ESP
2005 BMW M3 BMW-Twin Power 10/60
2003 BMW M5-M1 15/50
1998 BMW M3/4/5-M1 10/40
Re: API SH 30 hello from new guy [Re: Chris142] #5235721 10/10/19 09:50 AM
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Brian553 Offline
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Originally Posted by Chris142
Plenty of straight 30 here still. Odd that something that new says a straight weight is preferred. A 15w40 would be even better than a straight 30.



How so? Let's say for temps over 32F, what is the advantage?

Last edited by Brian553; 10/10/19 09:50 AM.

Delvac 15w40.............Valvoline Maxlife FS ATF........Liquid Wrench Penetrant
Mobil 1 HM 5w20........Valvoline Asian AF..................Liquid Wrench Chain and Cable



Re: API SH 30 hello from new guy [Re: sundy58] #5235733 10/10/19 10:08 AM
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tundraotto Offline
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Higher oil film strength at temperature, better oil pressure, easier staring, to name a few

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