CJ-7 258 Oil Type - JeepForum.com
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post #1 of 11 Old 02-10-2020, 08:33 AM Thread Starter
ejjaeke
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CJ-7 258 Oil Type

Just picked up a 1979 CJ-7 258. I have read all the threads about oil types, but I can't find any thread newer than 2011. Does anyone have any updated advice on the best motor oil type to use? Still best to use a diesel rated oil for higher zinc levels, or is there a better method? If I missed a thread that is more recent, I apologize. Looking forward to getting into this project!

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post #2 of 11 Old 02-10-2020, 08:42 AM
Matt1981CJ7
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post #3 of 11 Old 02-10-2020, 06:18 PM
Hurricane4
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Welcome ejjaeke! There is a wealth of knowledge and information on these forums.

Might want to change the displacement of your engine in your profile from 268 to 258 - maybe it was bored over?

Well OK - I'll jump in. Heavy Duty Flame Suit On. I use the following oil & oil filter in my 1979 Jeep CJ5 304 V8 . . . . .

Valvoline VR1 10W-30 (Non-Synthetic). I change the oil with the oil filter twice a year. I put maybe 2,000 - 3,000 miles on my Jeep per year.

I purchase the oil and oil filter from Summit Racing.

https://www.valvoline.com/our-produc...vr1-racing-oil

https://www.summitracing.com/parts/vlv-vv205-6

https://www.summitracing.com/parts/wix-51258

NOTE: I DO NOT KNOW: If this oil and oil filter will work for your particular engine - How your Jeep is driven - Or the climate where you and your Jeep reside.

Just responding to your question. Maybe look at sites like https://www.bobistheoilguy.com/ for additional info. One again Welcome!

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post #4 of 11 Old 02-10-2020, 06:49 PM
only in a jeep cj
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I use Valvoline 10w40 High Milage in all my CJs. Many years , no problems.

Now if you really want to stir the pot, ask everyone’s opinions on oil filters.

Ed
1975 CJ-6 1983 CJ-8
1986 CJ-7 Laredo 1986 2003 Inca Gold TJ Rubicon
2012 JKUR RHD
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post #5 of 11 Old 02-10-2020, 07:12 PM
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post #6 of 11 Old 02-10-2020, 08:16 PM
BagusJeep
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I use ordinary 10w30, not synthetic. With the low miles i put on the oil will not break down for several years. I try for annual oil changes. These engines have been running on this stuff for near 40 years, enough said.

However I do add a can of Arbo engine oil treatment to keep the lifters quiet. No idea what is in it but would not be surprised to see zinc. It is also very cheap.

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post #7 of 11 Old 02-10-2020, 10:52 PM
jeepdaddy2000
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I prefer a little thicker oil for older engines used in "normal" climates. Either 10-40 gas or 15-40 diesel oils are fine. The engines aren't sophisticated enough to require synthetic oils.


I run 15-40 Rotella changed every 5000 miles.


Rotella is also an acceptable oil for wet clutch applications in bikes and quads.

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post #8 of 11 Old 02-11-2020, 08:24 AM Thread Starter
ejjaeke
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Great stuff, thanks everybody. I know it is a touchy subject, but your advice is similar to the stuff I saw on bobistheoilguy, and I appreciate it. Looking forward to getting this project going!
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post #9 of 11 Old 02-20-2020, 08:13 AM
bicyclemonkey
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I was told to use Valvoline VR1 20w-50 in my '67 Beetle, so I'm just going to put that in my 258 CJ-7 when I change the oil next month. I only put maybe 3000 miles tops each year on each of those vehicles so I just change the oil every spring.
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post #10 of 11 Old 02-21-2020, 02:02 PM
hp_lovecraft
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I use whatever 15w-40 diesel oil is on sale, and have for 15 years or so.
Its thicker, has more additives, and... oddly.. tends to be cheaper then normal engine oils.
I'll change it usually after I've burned off 10 quarts or so. Its pretty black at that point.

My bigger problem is I can't get most filters to fit. Years ago I buggered up the frame a bit, and most filters just don't fit at all. The purolator ones fit, but pretty much all other brands don't. Fram and Wix-based ones don't. Or maybe another brand? its a hassle, so I just always use purolators now.
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post #11 of 11 Old 02-21-2020, 08:15 PM
jeepdaddy2000
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Quote:
Originally Posted by hp_lovecraft View Post
I use whatever 15w-40 diesel oil is on sale, and have for 15 years or so.
Its thicker, has more additives, and... oddly.. tends to be cheaper then normal engine oils.
I'll change it usually after I've burned off 10 quarts or so. Its pretty black at that point.

My bigger problem is I can't get most filters to fit. Years ago I buggered up the frame a bit, and most filters just don't fit at all. The purolator ones fit, but pretty much all other brands don't. Fram and Wix-based ones don't. Or maybe another brand? its a hassle, so I just always use purolators now.
Can't say as I agree with your maintenance schedule, but as for the oil filter issue:
https://www.summitracing.com/search/...elocation-kits
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