Accidentally dumped 5w-30 in the ZJ...Change?
Well, I was just pouring in the new oil and realized I got 5w-30 instead of 10w-30. Can I leave it in there?
1997 TJ 4.0, 5 Speed, Stock
Sold: 1998 Grand Cherokee 5.9 Limited
Victim of Hope & Change
Originally Posted by 5point9Limited
Most of the newer cars call for 5W.
This is from the 98 manual:
"Those who hammer their guns into plows, will plow for those who do not." -Thomas Jefferson
'98 ZJ Laredo 5.2 Selec-Trac (249 to 242 swap)
'05 KJ Limited 3.7 Selec-Trac
'94 ZJ Limited 5.2 Q-Trac- sold, after 17 years
'67 International Harvester Scout 800; 345ci V8,T18 4spd, Dana 20 TC
'06 Chrysler 300C SRT8 6.1L
The 5W and 10W refer to the low temp (or "winter") viscosity. The difference is so small that your engine won't be able to tell the difference during late spring and summer. Both the oils you mentioned behave like 30W viscosity oils when the engine is warm and there is no difference then. Bottom line, don't worry about it.
Senior Moment Member
When all is said and done, more is said than done.
Platinum '97 ZJ LTD, I6 (see profile) Paid for!
Links: Kevin (AKA KOR) for ZJ & WJ stuff,
Kolak for performance stuff. I6 performance info at Dino's jeep 4.0 performance site
Other stuff: Kevin's Roof Rack. KOR sliders, Bored 62mm TB, Blaupunkt Bermuda w/ ipod, Brembo Slotted rotors,
OME steering stabilizer, H4 headlight upgrade...
Yup me too. I use 5w-30 during the winter only and 10w-30 for the rest of the year.
94 Black Laredo 4-Liter with QuadraTrac (42RE trans & NP249 TC) 200,000 + miles purchased new
88 Cherokee 2-door with 5speed manual 139K miles(deceased) purchased new
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