Bypass oil filter

Thanks Ron was going to fit to my Hj61 (Tojo ) have used them before but wasnt sure what brand .Think 1st one was Mil Mac but think they no longer exist now that you mention it I remember Franz

I have a Filter 2000 unit, now called Filter Technology, they are based in Rutherford near Newcastle. I use a car sized unit because of the size and change every 5000Ks. My one is a alloy top you load the toilet type roll filter in but now the cover comes with the filter for a few $ extra, simply spin on. Regards Michael.

Brian - Mil-Mac and 4M are the one and the same. Mil-Mac is the (W.A.-based) company, 4M was the brand on the filter. I think the original business has undergone a lot of changes over the years.
I think the "4M" came from the 4 original blokes who produced the filter, their names all started with M.
Mil-Mac appear to still be in business, here's their contact details.

Mil-Mac W.A. P/L

Frantz have been in business for many decades, but as they are of U.S. origin, you pay a premium for their products.

The Filter Technology refills are about $8 if you insert them yourself if that system is still available and the newer spin on top is about $14 each, you can then extend your oil service time or just enjoy cleaner oil for $14 every 5000ks. My patrol has 380,000 ks on it and has had a bypass filter fitted since new and uses a few hundred millilitres of oil between 10,000 services!! Michael