Type of oil in 427 S/O

[JBCOBRA]

My Builder said to go with conventional 15/50 Gibbs.
He is a High Flow oil type of builder. Builds a ton of Roundy Round engines too.

[patrickt]

Originally Posted by JBCOBRA

My Builder said to go with conventional 15/50 Gibbs.
He is a High Flow oil type of builder. Builds a ton of Roundy Round engines too.

If I hadn't been using Brad Penn, I'd probably go with that... I just hate changing. I see that Joe Gibbs has "Conventional," "Semi-Synthetic," and "Synthetic." I guess that means our puddles are small, medium, and large.

[JBCOBRA]

LOL!!!
<<action>> knocking on wood.......and you may not even believe it, but I have No Leaks! "Hail Mary", T'is a Miracle

Originally Posted by patrickt

If I hadn't been using Brad Penn, I'd probably go with that... I just hate changing. I see that Joe Gibbs has "Conventional," "Semi-Synthetic," and "Synthetic." I guess that means our puddles are small, medium, and large.

[Silversmith]

I use a conventional/synthetic blend; Brad Penn 20/50. 12 quarts per change, but I'm happy with it. Yes I have converted!

[DanEC]

Keith Craft got me started on Joe Gibbs HR oil (conventional). I use it in several old cars now. He gave me a case of 10W-30 but since has recommended going to the heavier weight they offer (15W-50 - can't remember without looking).

[kevins2]

Originally Posted by DanEC

Keith Craft got me started on Joe Gibbs HR oil (conventional). I use it in several old cars now. He gave me a case of 10W-30 but since has recommended going to the heavier weight they offer (15W-50 - can't remember without looking).

Dan, did Keith say why he's recommending the heavier oil? My engine builder also recommends and sells Joe Gibbs (now called Driven, by the way) and has me using 10w-30.

Kevin

[DanEC]

Originally Posted by kevins2

Dan, did Keith say why he's recommending the heavier oil? My engine builder also recommends and sells Joe Gibbs (now called Driven, by the way) and has me using 10w-30.

Kevin

I contacted them because at hot idle I was getting as low as 15 psi with the 10W-30 oil. Tony with KC said I should probably switch to the 15W-40 oil since they build engines with some clearances a bit on the loose side.

So, I don't really know what to make of that - they started me off with 10W-30 and I'm still running it at the moment. I sort of think they were just suggesting a slightly heavier oil to take my mind off of watching the oil pressure gage all the time. I will probably switch again to the 15W-40 Joe Gibbs just because I have a case of it now - but the 10W-30 seems to be doing just fine.

Of course my FE is not as wild as a lot of them built for replicas and uses what I assume to be a standard pressure pump. Apparently KC doesn't subscribe to Rick Lake's position on FE oil pressure, at least not in all cases.

[kevins2]

Originally Posted by DanEC

I contacted them because at hot idle I was getting as low as 15 psi with the 10W-30 oil. Tony with KC said I should probably switch to the 15W-40 oil since they build engines with some clearances a bit on the loose side.

So, I don't really know what to make of that - they started me off with 10W-30 and I'm still running it at the moment. I sort of think they were just suggesting a slightly heavier oil to take my mind off of watching the oil pressure gage all the time. I will probably switch again to the 15W-40 Joe Gibbs just because I have a case of it now - but the 10W-30 seems to be doing just fine.

Of course my FE is not as wild as a lot of them built for replicas and uses what I assume to be a standard pressure pump. Apparently KC doesn't subscribe to Rick Lake's position on FE oil pressure, at least not in all cases.

Thanks Dan, my engine builder also made the comment about looser clearances. My oil pressure gets down to 20 when idling hot so I'm sticking with the 10w-30.