Bottom line on oil weight??? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

gotmud · 01-10-2004, 06:47 PM

I read a lot of the post and am trying to figure out what oil weight to go to on a 68 307 in North Georgia.

Im hearing the 10w/ anything is bad but 5w/anything is worse and that I should stick to sae30 castoil. Im also hearing words like viscosity which I have no clue what that means...but Im trying.

Will the SAE30 be ok year round? Temps hit mid to upper 90s in the summer and we typically have 3 weeks of 15-25 degree lows in the winter.

Any suggestions?
Thanks in advance

Rooster's 67 · 01-10-2004, 06:52 PM

10w30 year round should be good and personally id run mobil,shell or synthetic if it is new motor. mobil and shell pull thier own oil from ground, then sell the seconds to be used by everyoe else

jcueckert13 · 01-10-2004, 07:46 PM

10w 40 is what i use because of how hot it gets in the summer here in nm but 10w30 should work. on cold days a sae30 is harder on the motor because of the temp. just to break it down the 10 is the weight of the oil when it is cold and 30 is when it is warm. i would only run sae30 in the summer or for race use

71-longbed · 01-10-2004, 08:10 PM

i run 10w-40 ...summer highs reach high 90's and winter lows are just a little below freezing ... thinking about switching to 10w-30 and seeing how it runs ....

Blue Beard · 01-10-2004, 08:16 PM

I've run 10/40 in all my vehicles for a long time with out any problems.......Except of course my Harley.........

TODDS 72 · 01-10-2004, 08:25 PM

i think 10w 30 is about the best all around oil to use,inless you got a new ford and need 5w 20,this time of year i'm puttin 5w30 in custumers cars.

*1972C10* · 01-10-2004, 08:52 PM

Ive always ran 10w-40 valvoline white bottle motors are always clean as the day they were new inside and never had any problems Alot of folks just say oil is oil might be true might not i think runnin the same type of oil at all times helps But i could be wrong just what i think and do in my own cars

fast71 · 01-10-2004, 08:55 PM

Got mud , I'm 1 1/2 or 2 hours north of you and I run 15w50 mobile 1 full synth. year round and I dont have a problem.

whitesswj · 01-10-2004, 09:03 PM

I'm in Springfield, MO and run 20w50 castol year round. the oil light stays on a little longer in the 10 degree weather here in the winter, but it does fine on my old 68 250 c10!

jcueckert13 · 01-10-2004, 09:19 PM

now that my rings are going on my truck i am thinking of going to 20w50

Cat Fuzz · 01-10-2004, 11:41 PM

http://www.micapeak.com/info/oiled.html

Clicky

01-10-2004, 06:47 PM	#1
gotmud Registered User Join Date: Oct 2003 Location: Cumming, Ga Posts: 234	Bottom line on oil weight??? I read a lot of the post and am trying to figure out what oil weight to go to on a 68 307 in North Georgia. Im hearing the 10w/ anything is bad but 5w/anything is worse and that I should stick to sae30 castoil. Im also hearing words like viscosity which I have no clue what that means...but Im trying. Will the SAE30 be ok year round? Temps hit mid to upper 90s in the summer and we typically have 3 weeks of 15-25 degree lows in the winter. Any suggestions? Thanks in advance __________________ Glenn Cumming, Ga (68 C/10 Fleetside LWB 307 (64 C/10 Fleetside Shorty Custom 350, with 73 donor parts aplenty) (2001 Porsche Boxster S - 168 MPH of fun) (2005 Chevy Avalanche Z71 1500)

01-10-2004, 06:52 PM	#2
Rooster's 67 Registered User Join Date: Sep 2003 Location: DFW Posts: 765	10w30 year round should be good and personally id run mobil,shell or synthetic if it is new motor. mobil and shell pull thier own oil from ground, then sell the seconds to be used by everyoe else __________________ The problem with America is stupidity. I'm not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself?

01-10-2004, 07:46 PM	#3
jcueckert13 Registered User Join Date: Apr 2003 Location: Edgewood New Mexico Posts: 2,088	10w 40 is what i use because of how hot it gets in the summer here in nm but 10w30 should work. on cold days a sae30 is harder on the motor because of the temp. just to break it down the 10 is the weight of the oil when it is cold and 30 is when it is warm. i would only run sae30 in the summer or for race use __________________ 1990 subaru legcy (daily driver) 1987 Toyota 4runner (weekend toy) 1968 C30 flatbed dually 1970 C10 longbed stepside (in pieces) 1976 Dodge Dart 1963 Dodge Dart

01-10-2004, 08:10 PM	#4
71-longbed Its Magically Delicious Join Date: Jan 2003 Location: oregon Posts: 2,398	i run 10w-40 ...summer highs reach high 90's and winter lows are just a little below freezing ... thinking about switching to 10w-30 and seeing how it runs .... __________________ 71 C10 LWB 350sbc -TH350 12 bolt 3.42 Posi Of all my favorite things to do, The utmost is to have a brew. My love grows for my foamy friend, with each thirst-quenching elbow bend. Beer so frosty, smooth, and cold it's paradise pure liquid gold. Yes beer means many things to me that's all for now cus I gotta pee.

01-10-2004, 08:16 PM	#5
Blue Beard Registered User Join Date: Jan 2003 Location: Washington State Posts: 8,831	I've run 10/40 in all my vehicles for a long time with out any problems.......Except of course my Harley......... __________________ 1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo

01-10-2004, 08:25 PM	#6
TODDS 72 Not the nightly winner Join Date: Jul 2002 Location: CHARLEMONT MA.USA Posts: 763	i think 10w 30 is about the best all around oil to use,inless you got a new ford and need 5w 20,this time of year i'm puttin 5w30 in custumers cars. __________________ 72C10SWB BLUE 350/350 86K10LWB BLUE 5.7 700r4 7.5' fisher plow 93S10XCAB4X4 BLUE 4.3 4L60e 69gmc c10 v8 3 on the tree yellow 72k10 swb 350 3 on the tree green 86k15 swb5.0L 4spd brown

01-10-2004, 08:52 PM	#7
1972C10 Account Suspended Join Date: Dec 2003 Location: Texas Posts: 2,686	Ive always ran 10w-40 valvoline white bottle motors are always clean as the day they were new inside and never had any problems Alot of folks just say oil is oil might be true might not i think runnin the same type of oil at all times helps But i could be wrong just what i think and do in my own cars

01-10-2004, 08:55 PM	#8
fast71 Drive it like U stole it Join Date: Mar 2000 Location: tunnel hill ,GA /Chatt,TN Posts: 956	Got mud , I'm 1 1/2 or 2 hours north of you and I run 15w50 mobile 1 full synth. year round and I dont have a problem. __________________ 71 custom 10 swb 72 nova ss 72 nova custom 87 s10 96 burb 94 camry 53 5 window 3100

01-10-2004, 09:03 PM	#9
whitesswj Embrace the Redneck Join Date: Jan 2004 Location: Cabot, AR Posts: 1,334	I'm in Springfield, MO and run 20w50 castol year round. the oil light stays on a little longer in the 10 degree weather here in the winter, but it does fine on my old 68 250 c10! __________________ '01 Camaro *Son, you just can't get there from here...*

01-10-2004, 09:19 PM	#10
jcueckert13 Registered User Join Date: Apr 2003 Location: Edgewood New Mexico Posts: 2,088	now that my rings are going on my truck i am thinking of going to 20w50 __________________ 1990 subaru legcy (daily driver) 1987 Toyota 4runner (weekend toy) 1968 C30 flatbed dually 1970 C10 longbed stepside (in pieces) 1976 Dodge Dart 1963 Dodge Dart

01-10-2004, 11:41 PM	#11
Cat Fuzz My son, my joy. Join Date: Sep 2003 Location: Spokane WA Posts: 463	http://www.micapeak.com/info/oiled.html Clicky

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