Oil recomendations
 

In a 305 chev stocker what is the engine oil type and weight that is prefered.Thanks in advance.

Re: Oil recomendations
 

I have always used 5w30 Valvoline synthetic in my 455 Pontiac 68 Firebird bracketcar. I like it because it is clear when new. change it twice a year.

Re: Oil recomendations
 

I think if you walk around & look in some trailers you'd be suprised how many guys run Mobil 1...I run it in 5 W 30

Re: Oil recomendations
 

Unless you want to buy high dollar synthetics like Joe Gibbs or the racing version of Royal Purple, the Royal Purple street oil has the best additive package, the best synthetic base, and performs best in testing, among standard "street legal" motor oils, mineral or synthetic. The racing Royal Purple, and the racing Joe Gibbs oil are twice as expensive.

Re: Oil recomendations
 

OK. I'm probably a little biased here, but, Valvoline is the only oil manufacturer to have a RACE ONLY oil. What that means is, it has specific 'adder package' in the formula just for racing, it says on the bottle 'not for street use' and it's for real!
When the zinc content was reduced in most street oils a few years ago, (along with a bunch of flattened cams in race cars) Valvoline saw the need for a RACE ONLY oil, high zinc, low detergent etc. Flat tappet motors will benifit the most from this. I get really tired of listening to oil ads that try to compare ther synthtetic street oil to a conventional. All synthetic oil manufacturers buy their products from the same company it's all about how much of it they put in for their own 'blend'.
Don't believe the hype of a diesel oil as well. Yea, it does have a lot of the good stuff in it but it's designed for a max of 4000 RPM and as such, does not have the anti-foaming etc. for an 8000-9000 RPM race motor.
It's been proven on the dyno that a Valvoline, 5-30/10-30 conventional RACE ONLY oil will show better numbers, even against some synthetics !!!! Sure, if you want too, have your special 'go fast oil for class or heads-up racing' but put the reliable stuff right back in when ya done with that.
Valvoline Racing Oil is hard to find and a little costly but I don't believe it needs changing as often either, providing you don't have a lot of thinning from fuel blow-by, a smell test will tell ya.
Now the plug, stop by the Valvoline trailer on the midway to purchase (getcha some contingency decals as well) or you can buy it from JEGS online.

Re: Oil recomendations
 

Are you talking about VR1? Sure, it's a racing oil, and it's been around for decades. I used it to break in the flat tappet cam I put in my truck, and I also put in a bottle of GM EOS for even more zinc. However, I'm not sure it's necessarily the best choice for a stock or super stock oil. If you want to run a conventional oil, Valvoline's "Racing Conventional" (link) may be the ticket, or you might want to look into Brad Penn oils (link) - it's the old green Kendall GT-1. The difference between VR1 and Racing Conventional is that VR1 has more detergents and dispersants so it can be used as a street/strip oil, whereas Racing Conventional has very little detergent and dispersant content, so it's a track-only oil. All Valvoline racing oils have the same zinc content.
If you're changing your oil and filter every 15 passes, and especially if you're doing that with synthetic oil, you might want to send a sample to Terry Dyson (link) to see if you really need to change it that frequently.

Re: Oil recomendations
 

Bernie's not talking about VR-1 but V V850 conventional 10W30 or V V 853 5W30 synthetic. This oils are not street legal because of their formulation and are excellent oil for a stock and super stock car.

Greg

Re: Oil recomendations
 

you can buy the not street legal racing valvoline oils from your napa dealer..lowest price im sure..they order it for ya..

Re: Oil recomendations
 

Bernie has it right , the V V 850 Valvoline has the best conventional oil base stocks available and the zinc package to save your cam. we switched to it two years ago .