Penrite Enduro HD (yes, it's an oil thread)

martymoose

martymoose

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Sydney, Australia
For those of you who have been running Penrite Enduro HD 25w70 motorcycle oil in your older motors(new Redax motors take a slightly thinner oil), Penrite have discontinued this product. They still made the oil, which is their Classic Medium, and I have spoken to their technical guy, and he tells me same formula, OK for wet clutches.

Their classic light, medium and heavy are the multigrade equivalents of straight 30,40 and 50 oils.
Marty
 
I don’t trust the wording, semi synthetic vs full synthetic.

Semi synthetic oil is mineral oil with particular additives (like Nulon market) added.

Full synthetic oil is total bullshit. The average punter would presume that the oil was made in a scientists beaker. That’s not the case, it’s as the wording suggests, full of an amount of additives that the mineral oil can handle before it turns to shit. Semi synthetic is a lower amount of additives, than ‘full’.

Smell and taste it! You know the old saying, if it smells like shit, tastes like shit… chances are it is shit.

Create your own synthetic oil, throw some Nulon at your mineral oil, you’ll have smoother gear changes for about 1,000klm. Same as ‘full synthetic’ at half the price.

It’s all the rip off bastards in the oils ain’t oils marketing department do.
 
Red might chime in, but I think he recommends Penrite MC4ST 20w50 (as per Vince's link). I prefer mineral, as the tale is that it allows the heat to dissipate in the castings better than synthetic oil. Don't know if that's true or not, but the tech guys at Penrite told me that when I used to work there.
 
Synthetic oil at least in the USA is a meaningless term. It can be made from anything and sold as synthetic.

In 1999, Mobil sued Castrol here in the USA for selling oil that was marketed as synthetic oil even though it was made from petroleum oil and was little if any different than regular motor oil.

Neither the Society Of Automotive Engineers or the American Petroleum Institute has any definition of what synthetic oil is. So the court determined that anything can be called synthetic and Mobil lost their case.
 
Vince said:
Penrite uses something called Ester for their Synthetic Oils. Here is their Tech Blurb on what Ester is.
https://penriteoil.com.au/assets/tech_pdfs/Esters and Engine Oils - October 2015.pdf
Click to expand...

Used Penrith Ester in my methanol guzzling Speedway bike, it never complained.

Others used more traditional methanol friendly castor based oils, with big ends shattering in the pits, let alone on the track.

Ya gotta love an oil thread … (Hijack alert) although I loved racing with the ‘banned’ Pirelli jumbo rear tyres, fucken things near launched you into space when grabbing drive 😂

Race officials and scrutineers frowned upon anyone using them, and demanded to know where you got them ….. it’s where the term, go fuck yourselves was born.

Then a trip, similar to being sent to the school Principals office, upstairs to the Steward was required. 🙄 😂😂
 
I had some Penrite PAO/Ester oil bought for a KTM, so started using that or the V-Twin version in the Jota. Seems to like it.
 
Serious credibility there Chris, stand tall my man, Speedway... used to go to the showground in the sixties, amazing now i think of it, which of my parents were a speed addict...suspect my mother... both were office worker types...or the smell of Castrol R... liked your background on that oil, never knew that.

Had a slider land on me ( no was not riding it ) Weslake motor with ignition trouble, i was last call jonny, 3 bike shops had not got it going, rummage in box of discards, old bosch BTZ module with plug, really only needed full advance on that motor, rewire, 20 minutes later owner is trying to ride the slider on public road outside our rented property ( country town Bowral ), did not look to flash going in a straight line, dangerous really... anyway it was the look on owners face, as he bought it not running, first time heard the motor, he was well happy...bosch the module for all Weslake motors...grin j

Found this of much interest;
cybermotorcycle.com

Weslake SOHC Manual

History of British Speedway - The Machines and their Designers
cybermotorcycle.com
 
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