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Author Topic: Brenkert projector oil Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 08-20-2014 12:13 PM                     It isn't JUST about maintaining a thin film and or cushion of oil It is about not allowing a build up of crud, about the oil not becoming acidic and or turn rancid too quickly, it's also about not leaving a coating of varnish on the parts. Regular oil is ok for projectors in my book. However, there are definite advantages of synthetics over regular oil. Take the Christie Ultramittent for example. It is filled with about 4 to 5 ounces of LaVezzi synthetic oil which also contains suspended ptfe. That oil is in the intermittent for the life of that intermittent. I've rebuilt 15 year old Ultramittents where that oil was still remarkably clean and clear. There IS no particle magnet inside an Ultramittent to collect the minute loose metal particles... had there been they may have had an almost unlimited life span. Fifteen years is a long time for an intermittent that's running on a platter... LaVezzi rated their brand new intermittent's for an average of 7 years use running on a platter system using the recommended plain old projector oil. The best advantage of using synthetic is it has a much wider temperature range before it becomes either thicker in cold temps or thinner at high temps. So for that reason alone Synthetic oil is a clear advantage in a hot running projector. We also ran LaVezzi oil exclusively in DP-70. This allowed doing a yearly oil change instead of the normal 500 hour change. Phillips included particle magnets in two location in the DP-70... inside the intermittent and another magnet inside the oil pump gauze filter itself. If you run the recommended oil in a DP-70 that used to come from Kinoton there was quite a bit of metal particulate on that oil pump magnet at 500 hours. If you ran them with the synthetic stuff there was almost no metal particulate to clean off after an entire year. The intermittent magnet was not accessible for cleaning without first tearing the movement down. As to the weight of the lubricant required... That all depends on the metallurgy of the components being lubricated, the circulating system capabilities if there is one and the operating temperature of the equipment. In the case of the guy running SAE 30 oil in his drive in Century's they no doubt ran hot after a short while as many drive in projectors do. That SAE 30 oil when heated flows more like SAE 10 weight does. Mark  |  IP: Logged Jack Ondracek Film God Posts: 2348 From: Port Orchard, WA, USA Registered: Oct 2002 posted 08-20-2014 01:48 PM                        quote: Gordon McLeod Century oil was No 20 non detergent Didn't know that. Makes sense then. quote: Mark Gulbrandsen In the case of the guy running SAE 30 oil in his drive in Century's they no doubt ran hot after a short while as many drive in projectors do. That SAE 30 oil when heated flows more like SAE 10 weight does. Don't know that it's any more a big deal, but this was an indoor. It ran for many years as a changeover house and its last 15 or so as a single-machine platter booth. Come to think of it, you're right though. That guy had a set of Wenzels at his drive-in, replaced later by a Century SA. Same oil was used in those machines, too.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 08-20-2014 03:48 PM                     Well, that kind of oil gets warm it gets thinner... It's just how it is.  |  IP: Logged Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 08-20-2014 08:03 PM                        1. I hired the oil engineers at Chevron's old HQ in Louisville to take a fresh look at oil in Century and XL intermittents and to consider new technologies. They ended up with OC 30 Jet Engine turbine oil, not that we needed a tight spec oil, but it was available in 5 and 55 gallon put ups. It is 10 weight, non detergent. 2. Nick Mulone's dad in Pittsburgh once asked for guidance on what oil to use in his old Century c's. He had been using 30 weight, non detergent from 1948 and never lost an intermittent. I told him to change nothing; it is not broke.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 08-21-2014 07:00 PM                     Louis... Aero Shell 308 is the current synthetic equivalent of the Aero Shell Number 3 which is mineral based and does have an anti corrosion additive... a good thing for projectors. Today, Shell number three is only used in very specific older jet engines any more. Mark  |  IP: Logged

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