My slant has about 300-400 miles on it now and I need to change out the oil soon. I am not sure what the PO has in there or if he has added any sort of additive to protect the solid lifters.
My question is, what brand and weight of motor oil should I run in it?
Would I need a special oil with the additives already in it or can I use an additive of some kind in a normal motor oil?

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1966 Dart GT
1965 Barracuda

hello,
this topic has been discussed to death on this board. the search button will turn up some hundreds of hits. here is just ONE

happy reading.
regards,Rod

Easy answer. If the cam is stock or close to stock, just use a good brand of 10-30 oil, with no additives.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

Block has been decked .100
Head has been shaved .040, fully ported with 1.77/1.44 valves
Ported valve reliefs
Erson cam with 270 Duration (RV15m) I havn't looked up lift yet.
Bored .030
Pistons are .040 in the hole.
It is a 74 block with less than 500 miles on it since the work has been done.
2bbl Holly 350
Boss Hogg 3300 stall Torque Converter.
LBP 8 1/4 rear with 3.53 gears
lash set at .022

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1966 Dart GT
1965 Barracuda

I answered this over at FABO. Since its a NEW mill I would use a good grade of Synthetic Oil like Mobil 1.
Frank

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Scrapple: Because a mind is a terrible thing to waste.
73 Duster - Race Car
66 Dart Wagon - DD
178" FED
82 D150
All Slant powered

I am a firm believer in Mobile 1.

I have a 2.7 engine in a 2000 Intrepid that is notorious for early failure. i have ran Mobile 1 in mine since new and with regular oil changes at 155K miles the motor still runs perfectly without oil any consumption.

One caveat: During breakin (say for the first 1500-2000 miles) i would use regular old non synthetic.

sounds like you have a nice motor
good luck

And now for a different viewpoint....
Look at the Crower web site. Go to the FAQ's and read what they have to say about sythetic oils in race engines.

When Bruce Crower says something, I listen.

Make sure you look at the qualifier; "In Race engines."

CJ

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Part of Tyrde-Browne Racing

Since this is not a race engine and similar to mine, Mobil 1 is a fine choice.
I like it's characteristics allot!

I have been using 0-30W Mobil 1 in mine since break in. That has been about 50,000 now in the last two years. It starts up quick, holds good oil pressure, flows and cools well, and gets good mileage.

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Aggressive Ted

http://cid-32f1e50ddb40a03c.photos.live ... %20Swinger


74 Swinger, 9.5 comp 254/.435 lift cam, 904, ram air, electric fans, 2.5" HP2 & FM70 ex, 1920 Holley#56jet, 2.76 8 3/4 Sure-Grip, 26" tires, 25+MPG

I wonder if Bruce Crower knows about synthetics that have higher levels of ZDDP like the Kendal GT-1 he recommends? Mobile 1 15w-50, Mobile 1 5W-40 Turbo Diesel Truck (just bought a gallon last week), and the Racing and V-Twin formulations all have 1200 PPM zinc or better.

http://www.mobiloil.com/USA-English/Mot ... _Guide.pdf

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Joshua

That Crower deal was interesting. Seems like he might be getting a kick-back from Kendall. Every cam guys says use something different or their own blend. Just my thought. I've used Amsoil in all my autos for years. Never a problem. Also never a cam issue. How many people have really eaten cams up by running without a zinc and phos additive? Maybe they had antifreeze seapage and didn't realize? Who knows. Synthetics have been good to me. Heck I don't even change oil in my work vehicles till they have over 40,000 miles on the oil. Later.
Ryan

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10.74 @ 127.47 mph 1320 ft
6.65 @ 107.80 mph 660 ft

http://www.youtube.com/c/turbo66valiant
Follow on Instagram - turbo66valiant
Facebook - https://www.facebook.com/ryan.peterson.737

Speaking of oil change intervals. On my EFI vehicles I change the oil and filter every 5k miles. I'm switching my 4.7L Dakota to 5W-40 synthetic that I will change every 10k with a filter change and top up at 5k.

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Joshua

Good Man, your working yourself up to the 40,000 mile change interval.

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10.74 @ 127.47 mph 1320 ft
6.65 @ 107.80 mph 660 ft

http://www.youtube.com/c/turbo66valiant
Follow on Instagram - turbo66valiant
Facebook - https://www.facebook.com/ryan.peterson.737

www.bobistheoilguy.com

I have been using synthetics since 1980. I will continue to do so; my engines routinely last far beyond the 200K mark, with the exception of my Mopar 2.4, which was junk from the factory and IMHO is the worst Mopar engine in history (ate a head gasket at 40K). Anyhoo, Mobil 1 will make you happy, but I prefer Royal Purple. ask 10 people what oil is the best and you will get 10 opinions. Caveat emptor.

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If it was easy, everybody would be doing it.

Not that anybody's doing it yet, but in case anyone's thinking of doing it: please do not shill for Amsoil here. If you're using it and you're happy with it, fine. No problem saying so. We welcome hearing about your experience. Think very carefully before you go beyond that, and if you're a "dealer", please keep that fact to yourself.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

Dan: thank you! I was worried someone might do just that.

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If it was easy, everybody would be doing it.