Thread: V8 eng oil change questions

Originally Posted by northiam

Thanks man1
I was starting to think no one here had heard of this modern oil problems!
I used to drag race old V8 falcons that have these same cam where issues on recent oil.
My understanding is the zinc and phorous content in modern oil are to low for cast iron flat tappet camshafts. Also semi and syn oils are to slippery, friction is need at the cam lobe to rotate the lifter in its bore, if did doesnt it would last no time at all.
Worn camshafts and burnt valves are all problems for dino engines with modern unleaded fuel and low zinc/phr oils.
When ford updated their 1960,s windsor pushrod engines they fitted a roller cam, rover no such thing!

I found Penrite HPR30 seems to meet the requirements.
If someone had the measurements of the sealing ring that would be great.

I have read a few good things about Penrite HPR 30 and the zinc and phosphorus levels are good,maybe even a little too high as too much can also leave deposits on the cylinders and the valves,also doesn't have a very good cold start rating.I like to get a thinner oil that gets to the engine parts on start up as quickly as possible.Still searching for the right oil.Interesting statement about the synthetics being too slippery?
Cheers
Shane

Originally Posted by mandala1111

I have read a few good things about Penrite HPR 30 and the zinc and phosphorus levels are good,maybe even a little too high as too much can also leave deposits on the cylinders and the valves,also doesn't have a very good cold start rating.I like to get a thinner oil that gets to the engine parts on start up as quickly as possible.Still searching for the right oil.Interesting statement about the synthetics being too slippery?
Cheers
Shane

sorry I was thinking of my falcon
HPR 10 I should say
Im looking at Nulon 15w 40
15W-40 Modern Everyday Engine Oil - Nulon Products Australia

It turns out the D2 I've recently bought used Mobil 1 only by the original owner and had a cam replaced at 140,000km!

Originally Posted by northiam

sorry I was thinking of my falcon
HPR 10 I should say
Im looking at Nulon 15w 40
15W-40 Modern Everyday Engine Oil - Nulon Products Australia

It turns out the D2 I've recently bought used Mobil 1 only by the original owner and had a cam replaced at 140,000km!

Interesting about the Mobil 1.It is a great oil but think the zinc levels are really low.Great to hear some real feedback on oils.I have decided on the Penrite HPR 10 Gas seeing I am on LPG.It has 1220 ppm of zinc which seems right on the mark and has a viscosity rating of 10W-50.
Cheers
Shane

I'm running the Gulf Western brand oil, can't remember the specs off hand but can get them if your interested. It was recommended by another forum member in a previous thread. It's specifically designed for Race Engines, older engines & engines that run particularly hot which I believe the LR V8 does in our climate.
$17.00 or so for 5L from Safeway/Woolies, change every 5000kms. Does the trick for me
My 2c worth

I've seen the base oil source for GW, you might want to rethink.

Originally Posted by clubagreenie

I've seen the base oil source for GW, you might want to rethink.

There's a couple of other guys on here using it bud, please explain

Well oils ain't oils. For instance I no longer use castrol (even their apparent race base oils) as it's all BP stock now, not created/blended by castrol tech. Last I saw they were buying their oil (pre blended) from other stocks whose bases aren't raw stock.

Changing at 5000k might be ok, I used to do so with better oils.

AAAAARGH!
Another oil thread!
Started as the longest thread in history about a sump plug washer then morphed into another oil thread!

IMHO it doesn't matter what you use as long as you change it regularly in a V8. I have never looked for high zinc etc( but I guess have by coincidence used Valvoline 15-40 recently).

I pulled my cam at 200KK and it was worn a bit but really fine, and before I got the car the guy only changed at 10K for 67K of the car's life. I still havent got the crap off the bottom of the dipstick.
So don't stress , be happy!
Regards Philip A