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#1
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Castrol GTX Classic High Zinc
Anyone using this stuff? Seems like it might be a good alternative to the Valvoline VR1 Racing Oil that I have been using for years at a much lower price point.
https://www.amazon.com/dp/B09QXWLY2Y...t_details&th=1 |
#2
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I’d definitely consider using some if they didn’t only offer it in 20w-50, now if they had 10w-30 and I’d be a buyer.
I searched through their store and didn’t see anything other than 20w-50.
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1964 Tempest Coupe LS3/4L70E/3.42 1964 Le Mans Convertible 421 HO/TH350/2.56 2002 WS6 Convertible LS1/4L60E/3.23 |
#3
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Brad Penn makes a great oil that contains the upgraded ZDDP additive package required for flat tappet cams, racing applications and it comes in 10-30, 10-40 and 10-50 viscosities and you can even get it on Amazon.
This is slightly off topic, but it seems many people in the classic car/street rod world use thicker oil, i.e., 10/40 or 10/50 viscosity thinking it's better somehow. Your oil viscosity is determined primarily by your bearing clearance. Unless you have opened up your clearances then your much be better off with sticking to 10-30 oil. Your oil is a big part of your cooling system and if your oil is too thick you won't get enough flow across your rod and main bearings and the bearings can overheat and could even lead to failure if your hot rodding the engine, plus you might not get enough oil to the top end to lubricate the valvetrain components and to cool your valve springs. In a racing application bearing clearances are opened up and a thicker oil is recommended.
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Tim Corcoran |
#4
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To mirrior Tim's post....
At one time we were using Valvoline VR-1 10W-30 oil. In communication with a Valvoline Tech Rep he said clearances under .0025" they did not recommend 20W-50 oil. .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) 5.14 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
#5
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I'll also second Tim's post. I've always used Brad Penn (now called "Penn Grade") in my GTO. Just got a case in from Amazon and did an oil change a couple weeks ago. Yes, it's still green in color ...
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1971 GTO 455 H.O. Ram Air Nordic Silver - Black |
#6
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i have used this oil. no issues to report at this time, however, a second hand report of someone who stopped using it because it turned brown too quickly for them. I dont have alot of miles on the motor i have used it in, but castrol used to be pretty good, A quick internet search indicates that many oils change colors as the additive package sees some engine temp without any change in properties. i Also like rotella, or amazon high mileage in 10/40, but you hear differing opinions on that too. In my high rpm combo i use mobil one
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1969 carousel red firebird 455, richmond 5 speed 1964 540 gto 1971 lemans sport convertible 1972 Maverick under slow construction |
#7
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I would run that stuff in my old 455. But it had ,0035-.004 on the mains when built.
New engine is getting this, not cheap but about as good a oil as you can get. https://www.amazon.com/Schaeffer-Man...NrPXRydWU&th=1 |
#8
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I recommend Lucas hot Rod oil in all the builds that leave my shop. Viscosity depends on clearances.
https://lucasoil.com/hotrods-classic-cars |
#9
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I broke my engine in on Brad Penn and used it for one oil change. Then the machinist who did machine work and ran it on his dyno changed to Driven. So, that's what I use now. Not sure why he changed brands. I also use 10-30.
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