Heavier engine oil?
- kzwolfsr
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Heavier engine oil?
17 Mar 2007 11:41
What would be the side effects of using a thicker oil in my engine, like 20w? I would like to change the oil today if I get chance or should I just stick to 10w. I use mineral oil so I am not going on a long debate, cool?
1979 KZ SR650, stock candy persimmon red and crossover pipes
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
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- wireman
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- kzwolfsr
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Re: Heavier engine oil?
17 Mar 2007 11:49
this is my 1000 I am talking about and sometimes I go across the interstatelike 15 miles one way, but its getting warmer and I find myself stuck in stop and go traffic, plus I think I hit like 90mph on the highway sometimes or I do a little drag take offs with it!
1979 KZ SR650, stock candy persimmon red and crossover pipes
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
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- kzwolfsr
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Re: Heavier engine oil?
17 Mar 2007 11:50
By the way no oil cooler
1979 KZ SR650, stock candy persimmon red and crossover pipes
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
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- arobsum
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Re: Heavier engine oil?
17 Mar 2007 11:58
i run 20w-40 and 20w-50 all the time. no known ill side effects..

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- kzwolfsr
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Re: Heavier engine oil?
17 Mar 2007 12:04
So there is no hard starting, shortage of lubrication from pump screen being to fine?
1979 KZ SR650, stock candy persimmon red and crossover pipes
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
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- RetroRiceRocketRider
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Re: Heavier engine oil?
17 Mar 2007 12:06
wireman wrote:
.....and in what temps?
FWIW, the weather here in So Calif is very similar to what you have out there in Florida (minus the hurricanes of course :pinch:), and I run Castrol GTX 20w50 in my bike year-round.
Even in hot weather I run my bike pretty hard when the chance presents itself, and rush-hour traffic doesn't help cooling either. But I figure that with the oil cooler and 20w50 oil, I'm giving the bike at least somewhat of a fighting chance as far as cooling and lubrication are concerned.
how hard do you ride it?
.....and in what temps?
FWIW, the weather here in So Calif is very similar to what you have out there in Florida (minus the hurricanes of course :pinch:), and I run Castrol GTX 20w50 in my bike year-round.
Even in hot weather I run my bike pretty hard when the chance presents itself, and rush-hour traffic doesn't help cooling either. But I figure that with the oil cooler and 20w50 oil, I'm giving the bike at least somewhat of a fighting chance as far as cooling and lubrication are concerned.

Covina, So Calif!
78 KZ650-B2 = SOLD
84 ZN700 LTD = SOLD
84 ZX750 GPz = SOLD
89 GSX1100F Katana = SLEEPING
20 VN1700 Vulcan Vaquero (the Blue Cowboy)
Looking for my next project KZ
78 KZ650-B2 = SOLD
84 ZN700 LTD = SOLD
84 ZX750 GPz = SOLD
89 GSX1100F Katana = SLEEPING

20 VN1700 Vulcan Vaquero (the Blue Cowboy)
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- RonKZ650
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Re: Heavier engine oil?
17 Mar 2007 15:52
Hey Matthew, I'd stay 10w40 for this change. If you really want you can do 20w50 in the summer. That's what I used to do when I rode all winter. 20W is too thick if we get any more cold weather. Maybe we wont though? HA.

321,000 miles on KZ's that I can remember. Not going to see any more.
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- kzwolfsr
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Re: Heavier engine oil?
17 Mar 2007 16:07
Well I only did it in the 1000. Recently I have been riding it here in Denver RRRR and it got a little angry with me for stopping too much, so I decided to change the oil. I still have my 650 with the 10w just in case of the cold Ron!
1979 KZ SR650, stock candy persimmon red and crossover pipes
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
1981 KZ 1000LTD with non stock and more comfortable handle bars and 4 into one V&H
Original man of the Caribbean
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- RetroRiceRocketRider
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Re: Heavier engine oil?
17 Mar 2007 17:12
Bad on my part kzwolfsr.
I have absolutely no clue why I said Florida instead of Denver (whish is clearly visible in your sigline).
Maybe it was the palm trees in your avatar that I saw, and assumption took over from there. :pinch:
Like Ron said, sticking with the 10w30 or 10w40 for your bikes is a better idea, since I really doubt that in your neck o' the woods that you'll see nearly as high of temps (sometimes 100+) as we see here in So Calif during the summer.
Post edited by: RetroRiceRocketRider, at: 2007/03/17 20:15
I have absolutely no clue why I said Florida instead of Denver (whish is clearly visible in your sigline).
Maybe it was the palm trees in your avatar that I saw, and assumption took over from there. :pinch:
Like Ron said, sticking with the 10w30 or 10w40 for your bikes is a better idea, since I really doubt that in your neck o' the woods that you'll see nearly as high of temps (sometimes 100+) as we see here in So Calif during the summer.
Post edited by: RetroRiceRocketRider, at: 2007/03/17 20:15
Covina, So Calif!
78 KZ650-B2 = SOLD
84 ZN700 LTD = SOLD
84 ZX750 GPz = SOLD
89 GSX1100F Katana = SLEEPING
20 VN1700 Vulcan Vaquero (the Blue Cowboy)
Looking for my next project KZ
78 KZ650-B2 = SOLD
84 ZN700 LTD = SOLD
84 ZX750 GPz = SOLD
89 GSX1100F Katana = SLEEPING

20 VN1700 Vulcan Vaquero (the Blue Cowboy)
Looking for my next project KZ
Please Log in or Create an account to join the conversation.
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