What oil for my NC27?

[RhynoCZ]

Hi, I think I've got a problem, I've got '91 CB1 NC27 and I filled the engine like 1400miles ago with Belray 10W40 oil. The thing is, that I've put in 3 liters of oil, the dipstick shown its level on the to top line, slightely below, and now it's like 3mm above the bottom line.

Would my honda work with 20W50 oil? I used to use 20W50 in my GPz550 and if I compare it with 10W40 in GPz550, less oil disappeared.

Thanks for your help.

btw. the final drive ratio is changed to 15/44 and I do get over 14 000rpm once in a while.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[Wafer_Thin_Ham]

You can try it and see. Does it belch blue smoke? The oil must be going somewhere.
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[Robby]

Stick to the 10W40.

Burning a little under a litre in 1500 miles isn't a massive problem, just means it will need topping up sometimes. Burning oil itself isn't a problem, and using a thicker oil to burn less of it isn't necessary.

When you checked the level after the oil and filter change, had you run the engine for a couple of minutes? The filter holds 200-300ml of oil, so the oil level will go down a little after the first start.

[RhynoCZ]

I thought that honda wasn't really an oil burner, a friend of mine had 2 Honda bikes, CB500, CBR900RR and he never had to add oil during the season.

When I filled up the engine, I've put new filter there of course, I just went for a ride and I checked the oil level after like 100+ miles.
I checked the oil level while the bike was standing like two weeks, so it was cold and I assume that all fluids in the engine were at the bottom of it.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[temeluchus]

That's not heavy oil consumption.

If you rev it to the redline a lot it will use more oil

You can find 10w50 if you look around.
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Some shite cruiser. Now with guns and FREEDOM!

[prawny1]

my cb-1 never uses "any" oil between services, but the oil level does settle a little lower following initial run up after an oil + filter change.

stick with 10-40 semi synth don't be tempted to go to 20-50w i used it once to run for a couple days as a cheap flush, it caused smoking on start up10-50 might be an o.k. alternative though
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hellkat wrote:

Some people are only alive cos its against the law to kill them.

[JvG]

[quote="RhynoCZ"]Hi, I think I've got a problem, I've got '91 CB1 NC27 and I filled the engine like 1400miles ago with Belray 10W40 oil. The thing is, that I've put in 3 liters of oil, the dipstick shown its level on the to top line, slightely below, and now it's like 3mm above the bottom line.

Would my honda work with 20W50 oil? I used to use 20W50 in my GPz550 and if I compare it with 10W40 in GPz550, less oil disappeared.

Thanks for your help.

btw. the final drive ratio is changed to 15/44 and I do get over 14 000rpm once in a while.[/quote]

I would not put anything else in engine but the recomended grade for your bike wich is 10W-40, the only thing Honda also now reccomend (since 2006) is 10W-30. However you could go for a higher spec oil like Silkolene Comp4 or Motul 5100. They have higher spec additive packs and are only slightly more expensive but seem much easier/better on the engines...

[RhynoCZ]

I'm bit confused now, some say it's alright and some say it is not.

Check this page from the manual: https://s970.photobucket.com/albums/ae184/RhynoCZ/?action=view¤t=mazn.jpg&newest=1

I can only read first two numbers in the graph. These two say, SAE 20W50 and SAE 20W40.

GPz550 with 10W40 oil in it, needed 3.5 liters of oil per season, I filled the engine up with 3.0 L I think and then when it burner down to the bottom line of the scale (glass), I added a bit to keep it arround the center of the scale. When it was hot, I mean 30+°C the oil also leaked from the engine, not like there was a puddle under it, the oil just covered the engine because of the heat. I did 3125 miles (5000km) every season, then changed the oil. Second season I used 20W50, the same procedure, and again 3125miles with it, and not only it burned less, the engine was ''more dry'', I mean no leaks arround the gaskets. After 20W50 season, I sold the bike, so I gave the rest of the oil to the buyer, but there was no need to add some.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[temeluchus]

[Vincent]

Are you using the dip stick properly? Do you screw it in or measure it without screwing it in?

Mine doesn't burn any oil either.
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[temeluchus]

Means nothing.

I have owned two xj600 diversions. One drank a little oil, the other didnt. Usually means a little wear in the bores or a seal somewhere is perished, so a little is burned in the cylinder(s).

As long as it isnt belching smoke all the time i wouldnt worry.
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Some shite cruiser. Now with guns and FREEDOM!

[RhynoCZ]

[RhynoCZ]

[RhynoCZ]

[prawny1]

with the altered gearing the speedo will be nowhere near accurate by the way.

with standard dials 15f 37r is meant to give reliable speedo readings, this is because the speedo is driven off the front sprockt not the wheels.

as mensioned before 20-50 gave me a smoky start up, if you can get it 10-50 might help ,i also used 5-30 fully synthetic before gearchanges improved bit transmission/engine sound was increased so i went back to 10-40 semi synth,

i buy silkolene 10-40 workshop oil in 20l tubs so it lasts me a while depending on how many bikes i do.
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hellkat wrote:

Some people are only alive cos its against the law to kill them.

[RhynoCZ]

[Vincent]

[RhynoCZ]

[Vincent]

If you havn't already, get yourself on here too, it's not the busiest of forums as there's not that many of these bikes around but most info is on there:-

www.hondacb1.org/forum/index.php
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[RhynoCZ]

[prawny1]

[RhynoCZ]