Is it safe to run 20w50 oil in my TJ?

[Paul Land]

I'm still stuck on a "17 year old battery". What brand is it. I want one

2004 optima red top, company was sold and new red tops suck avg life 5 years.

 

[pc1p]

Fuck you! With your Smiley laughs lol Been to Australia? I thought not!, you have no idea? I have travelled USA 4 times in Summer and yes it gets hot, maybe come down under to eat your words Dickhead lol

Here's Phoenix (Arizona) compared to the two hottest daily high/low cities I could find good records on in WA (Perth and Kununurra)...

Like Australia, the US has extremely varied weather across latitudes and longitudes. For example, Fargo and Phoenix:

Oil will never freeze in your lifetime!

"Fuck you! With your koala laughs lol Been to the midwest? I thought not!, you have no idea?... maybe come up over and eat your words Dickhead lol"

McNally Institute says 10w-30 freezes at -20F. Gear and hydraulic oil freezes around -10F... here are the records lows (and highs) for each state on record (with both ºF and ºC to make it easier for you!)

 

[NOTNSUV]

This stuff is available in AU. Does not alter viscosity. Yup, it works.
http://www.powerupusa.net/products/power-up-products/nnl-690