Penrite oils - sludging still an issue?

[aratic]

I'm looking to use Penrite synthetic (10W40, because my car likes this grade) for my next oil change but doing a quick search I found a few old threads which said previous Penrite users have had bad sludging problems in their LS motors.

Is this still an issue with Penrite oils?

I notice now that some Penrite oils are 'SN' API rated, which is a recent change as far as I can see. One benefit of this, apparently, is 'improved sludge control'.

Any opinions on whether Penrite is better than it used to be?

[VYSHSV8]

Sludge is only ever an issue if you don't do frequent oil changes and that applies to all brands of oil

[Drewie]

Sludge is only ever an issue if you don't do frequent oil changes and that applies to all brands of oil

I agree with what you say above, but some of those old threads the OP is refering to were in cars that had regular 5000km oil changes. I have used Penrite in several cars over the years, but have been a bit reluctant to use it in my SS after reading some of those threads on here and other Commodore forums. It may have changed since though.

[VYSHSV8]

I have. Een using and running penrite in my cars for 20+yrs and never had a problem it's only cars that haven't been regularly serviced that you get splurging in

[boggers007]

My VE had penrite in it for the regular 15,000 services or watever it was, no sludging problems.

[swingtan]

I don't know about sludge, but Penrite used to have an issue with carbon deposits not being flushed back to the sump. I used to use it many years ago and would end up with a black coating inside the rocker cover that you could wipe off with a cloth. At the time I swapped to Wakefields ( now MartiniRacing ) and have never gone back to Penrite, because the Martini oil has never let me down. I do run Penrite in the gearbox though.

Simon.

[aratic]

Thanks for the replies.

I usually change the oil every 6 months or 5-7,000kms anyway so sounds like it wont be an issue.

Thing I like about Penrite oils is, even though they have a SM or SN API rating, they still have a healthy amount of ZDDP. Which I think is a good thing :D: