Regular unleaded will work for any stock Jeep. I assume you are running a 4.0L (6-cylinder)? There is no gain to be had for burning the expensive fuel unless you modify your throttle body or install serious performance-enhancements to your Jeep. Consider a fuel additive every 5,000 miles or so to keep your injectors clean if you really want to keep your fuel system at its peak.
Probably not, the fuel system is way different, as well as the ECM programming.
have your fuel system purged and cleaned. You can have this done at most shops for around $90
Th, element 90, spelled thorium, is an actinide and has been used as a nuclear fuel (see Wikipedia.)
In the fuel tank
It is in the fuel tank.
Yes, but you wouldn't want to do that, 90 is renix, and it has the older style radiator with the reservoir to fill it, where as your 98 has a filler cap, which eliminates air bubbles that occur from the reservoir.
I have a 93 rodeo 3.2 v6 (4x4) and it is rated at 125 psi (NAPA) but the engine only needs 90 psi
Avgas 90 was the fuel for a Liberator.
90 psi
All Camrys with fuel injection:The fuel pump is electronic and is located in the fuel tank....................
yes.
Yes, you should use a hyphen in "90-day" when it is used as a compound adjective before a noun, such as in "90-day warranty." However, if it is used as a predicate or after the noun, you would not hyphenate it, as in "The warranty lasts 90 days."