| Author | Message | ||
     Bob Shinn (Bshinn) New Member Username: Bshinn Post Number: 8 Registered: 01-2004 |
Did a search, but no joy. New Disco owner & need to know if it will tolerate 89 octane or is high test really manditory. Thanx Bob | ||
| Mike Deerfield (Mdeerfield) New Member Username: Mdeerfield Post Number: 12 Registered: 12-2003 |
Hi Bob; I'm a recent new owner of an 03. I remember just reading a thread on this topic. The responses were all over the board - from running the cheapest 87 to only using specific brands of high test. What I took away is this: 1. LR recommends per my owners manual at least 90 (of course 1 more than mid-grade) 2. If you are not getting spark knock, lower is probably OK 3. You may have some valve problems later down the road, if you use 87/89 4. LR service usually includes a fuel conditioner upon service (warranty service) 5. LR owners manual recommends not using fuel conditioner! 6. There is no black & white right answer. Mike D. | ||
| Bob Shinn (Bshinn) New Member Username: Bshinn Post Number: 9 Registered: 01-2004 |
Thanks Mike, I don't understand how using 89 would effect valve life, my main concern is detonation. The placard on the fuel filler door says premium, manual says 90-92, but the computer should back the timing off to kill any knock. Was just wandering how bad power is effected. These things are sold all over the world, (I know most are diesels) & fuel quality can be pretty poor in some places. I'm going to run a tank or two of 89, I'll let you know the results. Thanks Bob | ||
| Leslie N. Bright (Leslie) Dweb Lounge Member Username: Leslie Post Number: 2837 Registered: 02-2002 |
Bob, you're not gonna see a problem in a couple of tanks. Try searching the archives here, and you'll find threads like this one: ../17/36722.html> That has a lot to chew on in there..... As you said, elsewhere in the world these things have diesels, not V8s. The Rover V8 is pretty much designed around usage in the US.... not that it's not available elsewhere, but if you have concerns about fuel quality in your locale, you go with the diesel instead of the V8. The primary reason for using higher octanes is to retard detonation in higher compression engines: that's not the problem the Rover 4.0 has, it's carbon on the valves that's the bugger.... -L | ||
| Bryan Crosby (Bcroz) Member Username: Bcroz Post Number: 118 Registered: 03-2002 |
b'sides, the .10 per gallon difference between mid and premium isnt worth the problems on down the road. after spending $34k on a truck i'm not about to get cheap on gas. | ||
| Mike Deerfield (Mdeerfield) New Member Username: Mdeerfield Post Number: 14 Registered: 12-2003 |
I've been playing a little. Filling up at half talk and alternating between 89 and premium. Now that fuel is on the rise again, and in our community it's .16 difference. | ||
| david langley (Dplangley21) New Member Username: Dplangley21 Post Number: 2 Registered: 01-2004 |
a year ago when i bough my 2000 dII, i was having loss of power problems on the highway, also the service engine light came on, i took it in to the dealer still being under warranty, and they told me it needed a valve job due to who ever i bought the truck from ran low octane gas, they even said they could smell the difference after broke the engine down.. since i only run 92 octane or higher and have had no problems, its worth the exta 15 cents or what ever it may be.. plus higher octane = better gas millage! | ||
| jesse a henning (Darw_n) Member Username: Darw_n Post Number: 49 Registered: 06-2003 |
not only better millage, but a better combustion, meaning longer engine life, less "problems" its worth the extra, and the extra .16 cost is an invesment, and anyways, you own a truck that cost close to $50k new would you put low test in a porsche? thats my thoughts at least |
