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Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: OVERKILL] #2933698
03/09/13 04:38 PM
03/09/13 04:38 PM
Joined: Dec 2009
Posts: 27,785
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline

Joined: Dec 2009
Posts: 27,785
Regina, Saskatchewan, Canada
Originally Posted By: OVERKILL
Thanks, I didn't know that thumbsup


The 307 Chevs were a bit uncommon. We never had one in any of the taxis, and I only saw one example in a friend's vehicle, when we were doing a cam and lifter job.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: OVERKILL] #2933760
03/09/13 05:59 PM
03/09/13 05:59 PM
Joined: Dec 2010
Posts: 3,192
TEXAS
electrolover Offline
electrolover  Offline

Joined: Dec 2010
Posts: 3,192
TEXAS
Another little tid bit of info on the 307
The sbc can bore to 4 inches and make a 327 or 350


2004 F150 5.4 160k-Castrol TXT 5/40, Distance+ 3410-KREEN
2004 Explorer 4.0 130k-PU 5w30, Distance+ 3410
Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: Oldswagon] #2934031
03/10/13 01:55 AM
03/10/13 01:55 AM
Joined: May 2011
Posts: 1,353
PA
SS1970chrysler Offline
SS1970chrysler  Offline

Joined: May 2011
Posts: 1,353
PA
Originally Posted By: Oldswagon
Originally Posted By: OVERKILL
Originally Posted By: Silverado12
Back "in the day" when those cars were new, I ran 10W-30 and I took a 1970 307 Chevy to 140K miles and it still ran well, but had started using about 1 quart every 1,000 miles (considered normal at the time).


The 307 was an Olds motor, IIRC smile


Yes, but Chevrolet made a 307 as well. I was a 283 bore (3.875" bore) with a 327 crank (3.25"). It replaced the 283 in 1968 and went out of production after 1973. It was a lo-po 2bbl entry level V8. The 307 Olds was introduced in 1980, with a 3.80" bore and a 3.385" stroke, estentially a "debored" 350 Olds. It was built until 1990.


Yep. We had a '68 Impala 4dr hardtop with that 307 in it paired up with Powerglide transmission.


93 Towncar- Rotella T-30+M.Craft
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Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: jhammer382] #2934032
03/10/13 02:03 AM
03/10/13 02:03 AM
Joined: Jan 2009
Posts: 702
Lisgar, Ontario, DoC
Ibrahim Offline
Ibrahim  Offline

Joined: Jan 2009
Posts: 702
Lisgar, Ontario, DoC
HDD 30 grade oil or reg 40 grade! conventional or synth (fixed short oci's)


Edge EP 5W30
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Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: Clevy] #2934040
03/10/13 03:05 AM
03/10/13 03:05 AM
Joined: Jun 2009
Posts: 1,509
gulf coast FL.U.S.
FL_Rob Offline
FL_Rob  Offline

Joined: Jun 2009
Posts: 1,509
gulf coast FL.U.S.
Originally Posted By: Clevy
Originally Posted By: dave1251
Originally Posted By: FL_Rob
I'd go for a heavy duty 30 ,such as Rotella T5 10w30. With low miles and what sounds like a non-leaker, you can go with a nice Mobil 1 in 0w40 flavor.The ZDDP is what you're after with this engine,not just a thicker grade.


Nope. Myth's never die on the internets.

Ha. No kidding. 1100 posts and you'd think he woulda absorbed something.


Please state the myth of which you're referring to and why my opinion of which oil to run would be scrutinized as such.

Clevy...You're kidding ,right? The OP asked for opinions about oil selection and yet in the entire thread,I don't see any recommendations of your own,just an off-handed remark about not absorbing information. What's your recommendation to the OP in this matter?

Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: FL_Rob] #2934219
03/10/13 10:52 AM
03/10/13 10:52 AM
Joined: Mar 2010
Posts: 643
Finland
Finn Offline
Finn  Offline

Joined: Mar 2010
Posts: 643
Finland


1978 Vette 383" | 1986 Vette 350" | 2015 R1200RT LC | 1997 FXSTSB | 1991 300 SE | 2011 Superb 2.0 TDI CR
Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: electrolover] #2934253
03/10/13 11:33 AM
03/10/13 11:33 AM
Joined: Aug 2003
Posts: 1,415
Balto.
Bamaro Offline
Bamaro  Offline

Joined: Aug 2003
Posts: 1,415
Balto.
Originally Posted By: electrolover
Another little tid bit of info on the 307
The sbc can bore to 4 inches and make a 327 or 350

Chevy actually eventually took it to 4.125 in 3.75 in giving 400 cu in (6.6L). I believe they were all/most 2bbl.

Last edited by Bamaro; 03/10/13 11:35 AM.

2019 Carolla
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Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: Bamaro] #2934264
03/10/13 11:44 AM
03/10/13 11:44 AM
Joined: Apr 2008
Posts: 40,166
Ontario, Canada
OVERKILL Offline
OVERKILL  Offline

Joined: Apr 2008
Posts: 40,166
Ontario, Canada
Originally Posted By: Bamaro
Originally Posted By: electrolover
Another little tid bit of info on the 307
The sbc can bore to 4 inches and make a 327 or 350

Chevy actually eventually took it to 4.125 in 3.75 in giving 400 cu in (6.6L). I believe they were all/most 2bbl.


I had a buddy with a few 400's. One of them had Brodix heads, solid roller cam....etc. It was in an S10, ran bottom 11's.


2019 RAM 1500 Sport - Mobil 1 EP 0w-20, FRAM Ultra
2016 Grand Cherokee SRT - Ravenol SSL 0w-40, FRAM Ultra
Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: jhammer382] #2934315
03/10/13 12:50 PM
03/10/13 12:50 PM
Joined: Jan 2003
Posts: 1,832
Pac NW
Norm Olt Offline
Norm Olt  Offline

Joined: Jan 2003
Posts: 1,832
Pac NW
Interestingly there were 265, 283, 327, 350, 302, 307, 400, 305 & 262 cubic inch versions of the "small block" Chevy V8. How's about 365hp with two 4bbl carbs (or 375hp with fuel injection) from a 327?

GM had about 3 (or was it 4?) versions of 350 cubic inch V8 motors (and 2 307's) not counting a diesel version: the Olds and Buick versions differed from the standard Chevy/GMC.


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Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: FL_Rob] #2934737
03/10/13 09:41 PM
03/10/13 09:41 PM
Joined: Jul 2005
Posts: 11,771
Maricopa Arizona
dave1251 Offline
dave1251  Offline

Joined: Jul 2005
Posts: 11,771
Maricopa Arizona
Originally Posted By: FL_Rob
Originally Posted By: Clevy
Originally Posted By: dave1251
Originally Posted By: FL_Rob
I'd go for a heavy duty 30 ,such as Rotella T5 10w30. With low miles and what sounds like a non-leaker, you can go with a nice Mobil 1 in 0w40 flavor.The ZDDP is what you're after with this engine,not just a thicker grade.


Nope. Myth's never die on the internets.

Ha. No kidding. 1100 posts and you'd think he woulda absorbed something.


Please state the myth of which you're referring to and why my opinion of which oil to run would be scrutinized as such.

Clevy...You're kidding ,right? The OP asked for opinions about oil selection and yet in the entire thread,I don't see any recommendations of your own,just an off-handed remark about not absorbing information. What's your recommendation to the OP in this matter?


I am sorry to offend you but released studies have established that the current levels of ZDDP are more than adequate to protect flat tappet cams especially in the OP's vehicle. IMO the whole movement there is not enough ZDDP in modern oils has been overblown to mythic proportions when oils are analyzed from the same era as the OP's car ZDDP levels today are nearly the same. Takes this along with base oil improvement, other friction modifiers, anti-wear additives, the whole movement flat tappet cams need more ZDDP then modern oils already have just does not make sense to me.


http://www.bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=1049812&page=2


make the inside of your engine oil cap white.
don't use.
Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: Bamaro] #2934755
03/10/13 10:08 PM
03/10/13 10:08 PM
Joined: Sep 2005
Posts: 3,959
Massachusetts
Zaedock Offline
Zaedock  Offline

Joined: Sep 2005
Posts: 3,959
Massachusetts
Originally Posted By: Bamaro
Originally Posted By: electrolover
Another little tid bit of info on the 307
The sbc can bore to 4 inches and make a 327 or 350

Chevy actually eventually took it to 4.125 in 3.75 in giving 400 cu in (6.6L). I believe they were all/most 2bbl.


Different blocks guys. You can't bore a 307 to a 4.00" bore. If you did, the thin cylinder walls wouldn't last a trip to the grocery store.


2019 Escape EB AWD/2016 KIA Optima SXL 2.0L Turbo/2012 F150 Ex-cab 5.0L
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Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: Zaedock] #2934787
03/10/13 11:30 PM
03/10/13 11:30 PM
Joined: Mar 2013
Posts: 6
Iowa
jimurphy Offline
jimurphy  Offline

Joined: Mar 2013
Posts: 6
Iowa
I had a '76 Monte Carlo with a 350 while I was in high school in the late 80's / early 90's. I worked in the local GM dealership after school and they let me use their hoists, etc when it needed service so there was no real excuse for not changing fluids at their scheduled intevals. That being said, I always put 10W-30 in it. Beyond that, it got no special treatment, served me well and I wish I still had it. It died in 1993 with 167,000 on the clock when the timing chain broke.

Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: jhammer382] #2935121
03/11/13 11:03 AM
03/11/13 11:03 AM
Joined: Mar 2009
Posts: 204
Fort Erie, ON
fraso Offline
fraso  Offline

Joined: Mar 2009
Posts: 204
Fort Erie, ON
Regarding OP's original question about oil weight, see 1977 Pontiac Oil Recommendations.

Unless your oil runs extremely hot, I would use a 10W-30 HDEO. See Selection of the Right Motor Oil for the...d other Engines

Re: Best oil weight for 1977 Chevy Monte Carlo 305 [Re: jhammer382] #2935918
03/11/13 10:56 PM
03/11/13 10:56 PM
Joined: Mar 2007
Posts: 1,117
Chandler, Arizona, USA
coffee Offline
coffee  Offline

Joined: Mar 2007
Posts: 1,117
Chandler, Arizona, USA
I am using Castrol HM 10w40 and think it is a wonderful oil and seems to be a good fit for you as well.


Java Joe
1994 Volvo 945
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