what type & WT oil for my '71 350? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

97guns · 07-20-2007, 06:08 AM

i have some castrol syntec 5w/50 thats rated sj in my garage and was wondering if i should use it for an oil change. i have been reccomended shell rotella in another forum. just wondering what i should run.

cooters · 07-20-2007, 09:16 AM

castrol is great but dont run synthetic in a high miler motor as it will go through oil. 10-30 Castrol is my choice

manimal · 07-20-2007, 11:09 AM

Shell Rotella T 15w40 and a wix 51061 filter.
-Lance
Castrol does not have the zinc.

**Palf70Step** · 07-20-2007, 11:34 AM

Either will work, but like was said a high mileage motor may have some leakage issues if you start running the synthetic. Shell Rotella for diesel engines (use in gas or diesel) is about the best conventional oil on the market right now.

piecesparts · 07-20-2007, 01:09 PM

The studies have put down that the Shell Rotell has the additives that a lot of other brands have removed from their oils. These additives are needed for the older motors to provide the proper lubrication for the conventional design bearings and valves. The new grades and the synthetics are a "TRI" molecule based oil and it is not carrying the basics that the older Dinosaur olis did.

Jayss109 · 07-20-2007, 01:47 PM

Even the new Rotella is eliminating all the good stuff (zinc etc). All the new emissions stuff for diesels is making the oil manufac. remove it. GM eos additive is a good choice as well

Spanky_Pete · 07-20-2007, 02:15 PM

I have always run Castrol 10w30 in my small block chevys. I'll have to check into the Shell stuff.

07-20-2007, 06:08 AM	#1
97guns Registered User Join Date: Jul 2006 Location: san jose Posts: 54	what type & WT oil for my '71 350? i have some castrol syntec 5w/50 thats rated sj in my garage and was wondering if i should use it for an oil change. i have been reccomended shell rotella in another forum. just wondering what i should run. __________________ '71 LWB 350/350 banana yellow '02 VW GTI turbo 14 sec. 1/4 mile

07-20-2007, 09:16 AM	#2
cooters Senior Member Join Date: Oct 2006 Location: Edmonton Alberta Posts: 458	Re: what type & WT oil for my '71 350? castrol is great but dont run synthetic in a high miler motor as it will go through oil. 10-30 Castrol is my choice

07-20-2007, 11:09 AM	#3
manimal Registered User Join Date: Oct 2006 Location: Southern Kalifornia Posts: 3,066	Re: what type & WT oil for my '71 350? Shell Rotella T 15w40 and a wix 51061 filter. -Lance Castrol does not have the zinc. __________________ ------------------------------------------------------ -Lance 2000 Chevy C2500, 5.7, 4L80e 1999 Suburban K2500, 7.4, 4L80e 1980 Camaro..son's car...PROJECT

07-20-2007, 11:34 AM	#4
Palf70Step State of Confusion! Join Date: Jul 2002 Location: Gulfport, MS USA Posts: 47,216	Re: what type & WT oil for my '71 350? Either will work, but like was said a high mileage motor may have some leakage issues if you start running the synthetic. Shell Rotella for diesel engines (use in gas or diesel) is about the best conventional oil on the market right now. __________________ Bill 1970 Chevy Custom/10 LWB Fleetside 2010 Toyota Tacoma PreRunner SR5 Double Cab - DD Member of Louisiana Classic Truck Club (LCTC) Bill's Gallery Life isn't tied with a bow, but it's still a gift. Live simply. Love generously. Care deeply. Speak kindly. Leave the rest to God! Last edited by Palf70Step; 07-20-2007 at 11:35 AM.

07-20-2007, 01:09 PM	#5
piecesparts Parts and more parts Join Date: Nov 2003 Location: Lebo, Kansas (middle of nowhere Posts: 6,821	Re: what type & WT oil for my '71 350? The studies have put down that the Shell Rotell has the additives that a lot of other brands have removed from their oils. These additives are needed for the older motors to provide the proper lubrication for the conventional design bearings and valves. The new grades and the synthetics are a "TRI" molecule based oil and it is not carrying the basics that the older Dinosaur olis did.

07-20-2007, 01:47 PM	#6
Jayss109 Active Member Join Date: May 2005 Location: San Jose, CA Posts: 235	Re: what type & WT oil for my '71 350? Even the new Rotella is eliminating all the good stuff (zinc etc). All the new emissions stuff for diesels is making the oil manufac. remove it. GM eos additive is a good choice as well __________________ Cadillac Powered

07-20-2007, 02:15 PM	#7
Spanky_Pete Too many trucks? Nah... Join Date: Mar 2002 Location: SW Washington State Posts: 154	Re: what type & WT oil for my '71 350? I have always run Castrol 10w30 in my small block chevys. I'll have to check into the Shell stuff.

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