If you want to know, for certain, what is going on inside your engine, and how well your oil is performing, spend the money on oil analysis (~$20-$30). Change every 3000 miles. Fact is, the only time synthetic will cause that to happens is if the motor already needs a rebuild. You can use a standard 10-40, I used to. The big thing with oil is to change it regularly. The biggest cause of engine wear in motors like this is lack of zddp. However they were Chevy/GMC. Network/Field Engineer. Otherwise, any SAE oil rated "SM" is fine, as long as it is changed appropriately. CB750.com is dedicated to the Honda CB750 SOHC and DOHC motorcycles and to their owners who love to ride, restore, and customize them. It is hard on aluminum. Yes it has more detergents but not enough to cause damage, after all, a lot of new diesel engines have aluminum in them nowadays and this oil is very popular. I know a lot of people are running the Rotella, but I have seen the high detergent oil eat up aluminum engines. Used to have a 1979 CB750L, sold it as a parts bike, now riding a slightly modified 1984 VT700C. and if it hasn't been done I'd do a Seafoam treatment on the crankcase. Had to drop the oil pan, pump, and pickup off to clean them. If you live in a hot area, a 20-50 works too. Gas mileage has been good at 43 mpg. Areas in the south mainly. The destination is just to get gas! Diesel oil such as rotella has additional zddp in it. However, this oil is very easy to find in any auto parts store, it's the one in the red container, so you can look at its viscosity in your next trip to the Autozone. I hate to tell, you, but the dirtiest, nastiest, and gummy engines I have ever worked on were running Quaker Cake oil. Find great deals on eBay for cb750 oil. Start engine and  let run.Shut off and top off if needed.Set threads of dipstick in opening should be top and bottom marks on stick. Shop with confidence. There's really no mark on the dipstick that I can see. I can get it at walmart, but it is not synthetic. What type of oil should I put in my 1979 cb750 dohc? And how much? I use Mobil1 full syn ONLY in my race engines,haven't found any other thats cold flows as well and i leave the line at 140 water temp so i need that. It is often called the original Universal Japanese Motorcycle (UJM).. I have read on other forums that the Energy Saving feature of most automobile motor oils will play havoc with the clutches on the CB750 style motorcycles. The ride IS the adventure. 10w40. I know a lot of guys swear, by the Rotella T oil. Put 375,000 miles on my last truck. I also found that the bike runs cooler after the Seafoam. Sounds as if yours is broken off. Only let the truck go because the trans was starting to slip. Regular oil changes are a higher priority for me than spending big money on "special" or fancy bike oil. Also the Honda engines do not run anywhere near as dirty as a diesel engine. it gets right at 2 mpg better using Mobil1 full synthetic. Did not want to spend $1,900 on a $2,000 truck. After I got his 85 S-10 from him, and switched it to Havoline it was, so gummed up it would only hold 5-10 pounds of oil pressure. Road Passion High Performance Oil Filter for HONDA CB750 1969-1978/CB750 F 1980-1985/CB750 LIMITED EDITION 1979/CB750A HONDAMATIC 1976-1978 4.6 out of 5 stars 32 $5.89 $ 5 . Rumor has it the extra slippery stuff in there will cause clutches to lose their clutch-ability (if that's such a word). Engine did not use any oil, and was clean as new inside. Its great stuff and it's meant to take a beating. I use Rotella in everything but the Impala,my highway car. The Honda CB750 is an air-cooled, transverse, in-line four-cylinder engine motorcycle made by Honda over several generations for year models 1969–2003 as well as 2007 with an upright or standard riding posture. It produced 67 horsepower at 8000 rpm which was 15-percent more power than BSA's new 750 cc Rocket 3even though they weighed … Standard motor oil these days does not because it wreaks havoc with catalytic converters. It didn't end well. The CB750 "Four" offered a combination of features never before seen on a single motorcycle. In June of 1968, Honda dropped the gauntlet that would forever change the world of motorcycling. I use Texaco Havolin 10w 40 in all my bikes, and change it every 3000 miles. Oil type and amount?. my father has a 1971 CB 750 k and he's always used 20w 50 caster oil motorcycle, cause of the heat they put out, and he said stopping and waiting at red lights they build up a lot of heat and the heavier oil keeps the motor cooler at all times ,but in winter months takes a little more cranking cause of the thickness. Chilton's manual says 3.7 qts. I would always ask what kind of oil they were running, and the cleanest engines always had Texaco Havolin in them. It cleans the sludge left from bad oil that has collected on the seals and then those seals that were bad anyways, start to leak. 1976 CB 750-A X 2 1977 CB 750-A X 4 1977 CB 750-K 1976 CB 750 F 1981 CB 750 1966 Kawasaki SG 250 1981 KZ 750 LTD 1973 CB 350 1979 CM 185 Twinstar 1982 Honda XL 80 South of … I used to be a professional mechanic, and have torn several engines apart. You would be amazed not only at the gunk that comes out, but at how clean your next oil change will be. http://en.wikipedia.org/wiki/Shell_Rotella_T#Motorcycle_usage. I agree with TOOLS. Central OH, USA, Earth, Sol System, Milky Way Galaxy, Universe. I use Shell rotella T Triple as well. Quaker Cake, and Arco are the two oils I would never use. We had a E-350 with a 351w that Dad demanded we use quaker state in. They were plugged tight with gum, and goo. But the different in engine smoothness, shifting ease, and oil chain intervals more than made up for the slight additional cost. Thanks, Steve Haynes manual says SAE10W/40 3.5 litres at an oil change, 4.5 dry. Life is not about the number of breaths, you take, but the moments that take your breath away. Do the dohc bikes need the same oil as the sohc bikes?I know certain oils can mess up the clutches if used.I've been told that Rotella T oil is fine for the clutches. Swing arm, travel 325-19 (4 PR) Rib pattern. I can't recall the actual viscosity of the oil, it's thicker than what the manual calls for. There _seems_ to be a slightly easier clutch/shifting feel compared to the dino-type oil, but that may be subjective on my part. 20 w 50 in the south, do not use  synthetic on a old motor unless you want to rebuild that engine, if you live in cold climate up north use an oil stick warmer, on 20 w 50, remember ive had this 1971 Cb 750 since new and never rebuilt runs great. Where can I get Castrol, for $2.50 a quart? I use the Rotella truck oil in my Duramax and every race engine I ever had. His John Deer riding mower was dead, and burning oil in one summer, and his pickup, and van were both burning oil in 60,000 miles. What type of oil should I put in my 1979 cb750 dohc? Life is not about the number of breaths, you take, but the moments that take your breath away. 89 yes thank you.Does have to be for bikes like 4T or just automotive regular? That's what I always use. As a guest you can view the forum and photo galleries, but you have to register before you can post or view … I have torn down a lot of engines, and the cleanest ones were always running Havoline.

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