anyone running full synthetic gear lube in their outdrives
04-07-2014, 09:44 PM
#61
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"Clinging" gearlubes is exactly what you DO NOT want on your gears. Lucas is a big proponent of this type of advertising, and it is completely the opposite of what you want a gear oil to do. The clinging of gearlube leads to excessive heat throughout the gearcase and on the gears themselves, and a condition known as fluid friction. You want gear lube to on attach to the load faces of the gears and then fall off, leading to cooler temperatures. Why would you want gearlube anywhere but the load faces of the gears?
04-07-2014, 09:49 PM
#63
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would synthetic be over kill in a stock 502/bravo?
Fwiw most including mobil, Amsoil, redline NEO motul don't state the specific additives they use. Lubrication Engineers uses an additive that helps the cling and "climbing" ability of some gear oils. One of these is actually used in the power producing windmills located outside of Palm Springs California. The stuff is simply amazing to see in action.
04-07-2014, 10:08 PM
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Cmon, mercury marine would never do that! They don't care about profits, they care about your engine! Just like when they mark up the price 300,400,500% from the parts they outsource. The 525EFI heads are my favorite. Lets work out a deal with Edelbrock, so they change out the exhaust pattern a little. This way, if anyone cracks a head, they have to pay our prices, rather than go to Edelbrock for a replacement. Or sell a 400 dollar Dart intake manifold, for 1800 bucks. Well, the blue paint has to be worth 1400 bucks right?
04-07-2014, 10:10 PM
#66
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No. Why would you think that? Boat motors and drives are beyond perfect candidates for synthetics. You are running those motors in 5k rpm range quite often, hence they are under extreme stress and temperatures. Synthetics would only benefit you. They will lower operating temps, and lower operating temps means less friction. Less friction, longer component life.
04-07-2014, 11:10 PM
#67
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Has anyone tried the Joe Gibbs Driven gear oil in their drive? I'm curious how the mpao oil which is supposed to be in all their oils does being that it's supposed to be thicker?
04-08-2014, 10:28 AM
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There's no magic oil. Some better for a given application no doubt, however if the design is bad (ie bravo outdrive) failure will only be merely "postponed" by the best suited lube and aggressive maintenance. Modern automotive oils have evolved so much in the past 20 years, there is little room for improvement in "wear prevention" dept if you will. Oil formulators accomplished that many moons ago, and it doesn't have to be "synthetic" either. Synthetic oil does not automatically equal less wear. Unfortunately it's much more complex than that. Today formulators are replacing ZDDP and blending very light weight oils in the name of fuel economy, however they are doing it while still preserving the anti wear characteristics, along with extended drain capability, given we are discussing the proper application.
Last edited by Borgie; 04-08-2014 at 10:35 AM.
04-08-2014, 10:46 AM
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04-08-2014, 11:30 AM
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Most of the base oil technologies are from the major oil companies, that's old news. Their R&D teams have bigger budgets than the entire company's budget for Joe Gibbs Driven. But when professional race teams use these in their rear ends that are being used and abused on the race track, it makes sense to gravitate towards what they are doing.
