Mixing oil weights? Whats the right combination?
#1
CF Veteran
Thread Starter
Join Date: Sep 2009
Location: Summerville, Ga
Posts: 6,322
Likes: 0
Received 5 Likes
on
5 Posts
Year: 1995
Model: Cherokee
Engine: 2.5 4 cyl.
Mixing oil weights? Whats the right combination?
Ok, so today i went and bought oil to do an oil change. Paid the $31 for my Mobil 1 full synthetic at walmart, walked out the door, and went to do my oil change. Oil change goes perfectly (besides the quart of oil on the ground from the oil catch getting move) and i start to go about my day. Well i go to put the last small bit of oil left in the jug on the shelf and notice I've filled the jeep with not the 5w-30 for the jeep, but instead the 5w-20 for the accord..
So heres where my question comes in, is there a weight of oil that i can put into my jeep to even out to around 5w30 or maybe a little heavier? Id much rather spend $10-$15 dollars on 2 quarts of oil then another $31 on 5 more quarts... Any help on this?
So heres where my question comes in, is there a weight of oil that i can put into my jeep to even out to around 5w30 or maybe a little heavier? Id much rather spend $10-$15 dollars on 2 quarts of oil then another $31 on 5 more quarts... Any help on this?
#2
Senior Member
Join Date: Sep 2011
Location: lake hartwell
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0 i6
I would say 5w40, but I'm not 100% on that.
EDIT: 3 quarts of 5w20 mixed with 2 quarts of 5w40 comes out to 5w28..
EDIT: 3 quarts of 5w20 mixed with 2 quarts of 5w40 comes out to 5w28..
Last edited by zak873; 05-24-2012 at 09:24 PM. Reason: did some 1st grade math
#3
CF Veteran
Thread Starter
Join Date: Sep 2009
Location: Summerville, Ga
Posts: 6,322
Likes: 0
Received 5 Likes
on
5 Posts
Year: 1995
Model: Cherokee
Engine: 2.5 4 cyl.
I was thinking the same, but wasnt sure that would be the case.. I was thinking maybe a bottle of 5w-40 and one 5w-50? (if they even make 50 )
#4
Senior Member
Join Date: Sep 2011
Location: lake hartwell
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0 i6
3-5w20
1-5w40
1-5w50
=
5w30
#5
CF Veteran
Thread Starter
Join Date: Sep 2009
Location: Summerville, Ga
Posts: 6,322
Likes: 0
Received 5 Likes
on
5 Posts
Year: 1995
Model: Cherokee
Engine: 2.5 4 cyl.
Yeah ive got a 2.5, full with filter is right at 4 quarts. My idea was to be slightly thicker than 5w30, but not quite 5w-40. So i figured 2 qts 5w-20 + 1 qt 5w-40 + 1 qt 5w-50 would give me something like 5w-35? maybe a little lower?
#6
Senior Member
Join Date: Sep 2011
Location: lake hartwell
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0 i6
2-5w20
1-5w40
1-5w50
= 5w32.5
2-5w20
2-5w40
= 5w30
Last edited by zak873; 05-24-2012 at 09:39 PM. Reason: 1st grade math failed me..
Trending Topics
#9
Senior Member
Join Date: Sep 2011
Location: lake hartwell
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0 i6
eh, I wouldn't run 5w20, summer or not lol. less viscosity.
hahaha. I would just throw in 2 quarts of 5w40 tbh..
hahaha. I would just throw in 2 quarts of 5w40 tbh..
#11
CF Veteran
Join Date: Aug 2011
Location: Nor-Cal Coast
Posts: 10,489
Likes: 0
Received 18 Likes
on
18 Posts
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
Summertime in Georgia? If I had a warranty contract with someone in Fargo that just might gun the engine stone cold, I'd tell them to run 5W! (might make 70,00 on that). Myself I go toward somewhat thicker since it doesn't get so cold here. Just my .02
I might drain some and leave it in a jug for a good long time....a month, then use the top 3/4 in the Honda? Idk. again just a thought. Multy grade seems to work fine for chainsaw bar oil.
I might drain some and leave it in a jug for a good long time....a month, then use the top 3/4 in the Honda? Idk. again just a thought. Multy grade seems to work fine for chainsaw bar oil.
#12
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 15 Likes
on
15 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
Uuuh, I did say for just one oil change. If u want to guess at how many qts. of whatever weight oil, then guess......or, bite the bullet and correct your mistake by dumping and re-filling correctly.
A can of STP will raise the viscosity. Ever seen the STP screw driver test? It's impossible to hold on to the screw driver when dipped in STP.....dipped in just motor oil, u can hold on to it all day long.
A can of STP will raise the viscosity. Ever seen the STP screw driver test? It's impossible to hold on to the screw driver when dipped in STP.....dipped in just motor oil, u can hold on to it all day long.
#13
CF Veteran
Thread Starter
Join Date: Sep 2009
Location: Summerville, Ga
Posts: 6,322
Likes: 0
Received 5 Likes
on
5 Posts
Year: 1995
Model: Cherokee
Engine: 2.5 4 cyl.
I was thinking that as well.. If this summer will be anything like the last (around 105* some days) then i think the thicker oil will be a much needed thank you for my little 2.5
#14
Senior Member
Join Date: Sep 2011
Location: lake hartwell
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1991
Model: Cherokee
Engine: 4.0 i6
#15
CF Veteran
Join Date: Aug 2011
Location: Nor-Cal Coast
Posts: 10,489
Likes: 0
Received 18 Likes
on
18 Posts
Year: 90,84
Model: Cherokee
Engine: 4.0,2.5
An engineer buddy of my dads thought STP was "pure petroleum". ?? so I just looked at wikipedia>> http://en.wikipedia.org/wiki/Heavy_crude_oil
Agreeing with Djb...it would just work to thicken regular oil. More longer polymer chains maybe. No idea myself about mixing it with synthetic.
Agreeing with Djb...it would just work to thicken regular oil. More longer polymer chains maybe. No idea myself about mixing it with synthetic.