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06-06-2015, 08:01 AM
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#1 |
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Registered User
Join Date: Jan 2015
Location: Hudson, fl
Posts: 118
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Oil chance
Gonna change my oil (350 with 305 heads). What is a good 20w50 oil with lead in it?
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06-06-2015, 08:20 AM
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#2 |
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Registered User
Join Date: Mar 2013
Location: Marquette michigan
Posts: 828
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Re: Oil chance
The oil you are looking for has the additive called ZDDP, a zinc based additive. Look at rotella t, delvac, or possibly get a bottle od ZDDP additive. Gm I think still sells a bottle of what was called E.O.S. for engine oil supplement. This was used to add to the oil during initial camshaft break in period after a engine rebuild. As just a quick reference if the oil is almost colorless it's for newer engines (basically no ZDDP) and if the oil looks like the color of honey it probably has the ZDDP additive. The ZDDP obviously was there in the 90's and back for NON ROLLER LIFTERS. Newer engines don't need it and shouldn't use it because what has been learned is using the colorless oil without ZDDP has extended the life of O2 sensors and catalytic converters substantially.
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06-06-2015, 08:25 AM
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#3 |
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Senior Member
 
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Oil chance
Use Dynasaur based oil . synthetics were designed for modern engines .I've used Castrol 20-50 for many years in many classic cars and trucks and it never let me down living in Tampa bay with the high heat and heavy traffic .
http://www.carsdirect.com/car-repair...-synthetic-oil http://www.castrol.com/en_gb/united-...gine-oils.html |
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06-06-2015, 09:07 AM
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#4 |
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Registered User
Join Date: Jan 2015
Location: Hudson, fl
Posts: 118
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Re: Oil chance
I've got castrol GTX 20w50,,,might that work?
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06-06-2015, 09:45 AM
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#5 |
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Registered User
Join Date: Nov 2014
Location: Austin
Posts: 749
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Re: Oil chance
valvoline racing oil has zddp
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06-06-2015, 11:53 AM
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#6 |
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Senior Member
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Oil chance
he's not breaking in an engine and has no need of synthetics regular old castrol 20-50 and he's done nothing special about his 350 .
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06-06-2015, 03:42 PM
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#7 |
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Registered User
Join Date: Jan 2015
Location: Hudson, fl
Posts: 118
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Re: Oil chance
Ok,,,,I've got Castrol GTX 20w-50 and using Rislone oil supplement with zinc....here in florida,,,think that might work ok?
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06-06-2015, 12:26 PM
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#8 |
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Registered User
Join Date: Apr 2010
Location: So Cal
Posts: 1,470
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Re: Oil chance
Chevy recommends 10W-30 in these old engines. This picture shows how much lubrication you don't get from 15W-40 when the engine and oil is cold. They didn't even bother to show what 20W-50 looks like when cold.
The protection the heavier oils provide your bearings is only better above 250 degrees, but the increased wear on the bearings when the oil is cold, really shortens engine life. Most of the oil gets pushed through the by-pass valves.
__________________
'67 GMC 2500, 292, 4spd, AC |
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06-06-2015, 07:33 PM
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#9 | |
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Senior Member
Join Date: Dec 2013
Location: Gods country East,Tn
Posts: 8,545
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Re: Oil chance
Quote:
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06-06-2015, 08:05 PM
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#10 |
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Registered User
Join Date: Jan 2015
Location: Hudson, fl
Posts: 118
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Re: Oil chance
LOL,,,,,I live in florida,,,
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06-06-2015, 01:25 PM
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#11 | |
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motor exploder
Join Date: Mar 2009
Location: Pittsburgh, PA
Posts: 2,346
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Re: Oil chance
Quote:
https://540ratblog.wordpress.com/201...-test-ranking/
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Adam 1969 Chevy CST/10 stepside, DART Big M/TREMEC Magnum Extreme/3.73's w/Detroit Truetrac 1965 Chevy Bel Air Wagon (daily driver), 327/TH350,10 bolt w/3.08's 1961 Chevy Bel Air Sport Coupe, ZZ454/M21/9" rear w/3.50's & Detroit Truetrac 2005 GMC 1500 ccsb 2wd, 6.0L/4L65e/3.73 G80 2006 GMC 2500HD ccsb 4x4, DMax LBZ/Allison 6spd/4.56's w/Detroit TrueTrac  Use the SEARCH function on this forum - it is your friend!! |
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06-06-2015, 02:45 PM
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#12 | |
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10/30/19
Join Date: Aug 2004
Location: ottawa kansas
Posts: 5,248
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Re: Oil chance
Quote:
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Fight the good fight, finish the race, keep the faith |
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06-06-2015, 05:45 PM
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#13 | ||||
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"I ain't nobody, dork."
Join Date: Sep 2007
Location: Whidbey Island, Washington
Posts: 8,971
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Re: Oil chance
Oil with lead?
 Why 20w-50? Seems a tad thick... even for Florida. Gary
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'cuz chicks dig scars... My 1972 GMC 1500 Super Custom (Creeping Death) "long term" build thread. The Rebuild of Creeping Death after the wreck Quote:
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06-06-2015, 06:15 PM
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#14 |
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Registered User
Join Date: Jan 2015
Location: Hudson, fl
Posts: 118
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Re: Oil chance
Engines get quite hot here,,,ran in the suv's I've had,,,seemed to work well,,,run it my motorcycle,,,seems to lubes well,,,,,for instance,,,todays heat index,,real feel 102
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