I have an original 1965 Chevelle with 26,000 miles. Should I just use a conventional motor oil?

[drtyler]

WalMart has it , 10w-30 GTX Classic Conventional listed but I would bet you would have to order it. Lately there have been things that show up that they have but we can only get thru online orders. What is strange is how they don't have it and then it shows up at the store for pick up so fast like in 1-2 days at most.

Walmart has regular Castrol GTX in 10W-30, API SP, which is not what his Chevelle needs.

There is a Classic GTX with retro label that has higher zddp. It has only been available in 20W-50 to my knowledge.

Here:

 

[JHZR2]

That’s quite a car, though I’m sorry to hear that you lost your dad.

I’d run an HDEO and call it a day. Can’t go wrong with any, but I’d lean towards Delo since the pumping characteristics are really good.

 

[jhs914]

Ooooh! I like it! A real sleeper. A 327 (my favorite small block Chevy), 4 on the floor, on a post coupe with dog dish hubcaps.
I'd run a 10W-30 or 5W-40 diesel/passenger car rated oil.

 

[Jackson_Slugger]

I'm not sure he's trolling. The trolls typically start off with something inflammatory first thing.

Actually a good troller makes about 20 posts that are pedestrian before lobbing thread-grenades...

 

[ZeeOSix]

It's a shame the troll comment was introduced so early to a brand new member. Not very welcoming.

And not even a like or an apology from the accuser.

 

[Randy_R]

Assuming it won’t be your daily driver, Valvoline Vr1 conventional will fit the bill nicely! Please tell me it’s a Z16! Pics please!

No reason

A 300 post stripper bench seat with a 4 speed Muncie and 327….L79?

Doesn’t look like an L79.
VR1 10W-30 would be great, even if it’s a daily driver. Also Penn Grade 1 or Driven. That’s a 327 in the pic. What HP? 250 or 300?

 

[Randy_R]

Castrol makes a specific oil for flat tappet cam shaft engines. I bought mine at Wally World.

You refer to Castrol GTX Classic. Does that come in anything but 20W-50?

 

[JeffKeryk]

You refer to Castrol GTX Classic. Does that come in anything but 20W-50?

Not to my knowledge. I think it would be a good choice for your car.

 

[K-Man]

Quick mention: you might want to look at the transmission and rear axle lube. If they've never been changed, you might want to consider doing that. At least check the levels. The engine oil ain't the only thing to consider.

 

[Randy_R]

Not to my knowledge. I think it would be a good choice for your car.

Not my car. 10W-30 is just fine for me.

 

[vssjim]

It's been a while changing oil with a steel canister oil filter as I used to own a 67 C10 V8

 

[mpack88]

Castrol makes a specific oil for flat tappet cam shaft engines. I bought mine at Wally World.

I'm using the Castrol GTX Classic in my 75 LTD. Seems to like it. I just wish they made it in a 10w30/40. I don't think walmart carries it anymore but Amazon does.

 

[SeaJay]

i would use conventional if it was mine.

 

[blufeb95]

The GTX Classic Car is mostly Group I, that might play a little nicer with older seals.

 

[kschachn]

The GTX Classic Car is mostly Group I, that might play a little nicer with older seals.

Groups I-III are essentially identical molecules, how is that possible?

 

[Focus82]

It was my dad's car. He bought the car brand new 6-5-1965 in Iowa. I lost my dad in March of 2021

I'm sorry for your loss. I hope you get many good years of your car.