| Author | Message | ||
     Andy Hager (Ahager) New Member Username: Ahager Post Number: 1 Registered: 08-2003 |
OK. SO the factory recommends premimum on the 1999 Disco ... and I have been faithful, But, can one safely drop to mid-grade (at least) during the cool weather? Anyone tried it? Anyone know of a dreadful outcome? Thanks! Andy | ||
| Ken Tipton (Irish_nv) Member Username: Irish_nv Post Number: 110 Registered: 10-2002 |
used premium like religion first year. Haven't used it since. this has been debated many times. people are right down the middle on this one. bottom line is your truck won't blow up. | ||
| Danno (Danno) Senior Member Username: Danno Post Number: 254 Registered: 08-2002 |
150k on cheap gas and still going... | ||
| p (Pfb) New Member Username: Pfb Post Number: 24 Registered: 08-2003 |
Does the '99 have a knock sensor? If so, the end result at worst would be more retarded timing, hence less power. My '94 3.9 V8i runs fine at 7,000 feet on regular... No knock sensor, simple engine. | ||
| Andy Hager (Ahager) New Member Username: Ahager Post Number: 2 Registered: 08-2003 |
All, thanks for the assist! Honestly, this is wat I thought. It's off warranty as of the next 150 miles and 3 days (4 years) and I have owned it only for the last 1500 miles - so, what the heck! I've been maintaining old Peugeots and BMWs for the last 15 years ... so I'll apply the sense my momma gave me and try mid grade for a while! Thanks again folks!!! Cheers! | ||
| Dean Brown (Deanbrown3d) Senior Member Username: Deanbrown3d Post Number: 775 Registered: 02-2002 |
I used only midgrade | ||
| June H. Han (Junehhan) Member Username: Junehhan Post Number: 86 Registered: 04-2003 |
The manual states that premium fuel is required, not recommended. If this vehicle requires premium, then there is a reason why. Let's not also forget that if a vehicle requires premium, then it's likely tuned to run optimally on premium. Seriously though, how much money will you save by running a lower octane fuel? If an engine is tuned for premium, and you run it on a lower octane fuel, it may not blow up, but it will keep it from operating as efficiently as possible. If it does have to retard the timing to prevent detonation, then the money you saved by filling with a lower octane fuel may be wasted by decreased fuel economy, especially if it's not producing as much power forcing you to use the gas pedal more aggressively. | ||
| Phillip Perkinson (Rover4x4) Senior Member Username: Rover4x4 Post Number: 415 Registered: 02-2003 |
I think they are perhaps higher compression hence the required octane. but I dont know? I mean how much more will it cost to burn the good shit. Use the good shit, its better for your truck. It is likely that using the lesser octance will have detrimental effects on milage. Bottom line use the good stuff. if cant afford it why get a LR? | ||
| Donald M (Discodon) New Member Username: Discodon Post Number: 4 Registered: 08-2003 |
You guys are worried about paying for premium fuel??? Don't get me started on that... $6 a gallon here | ||
| J E Robison Service Co (Robisonservice) Member Username: Robisonservice Post Number: 109 Registered: 10-2002 |
Lower grade fuel will result in the ECU setting more retarded timing. More timing retard will result in greater engine heating and lower efficiency. You may or may not perceive the difference but it's there. If you are a driver who does not notice by all means run the cheaper fuel if you want. Land Rover reps have also told me that lower quality fuel/timing retard contributes to buildup of carbon on the exhaust valve stems. This may be a problem for you in the future - I really don't know. Personally, I use hi-test. | ||
| Joey (Joey4420) Member Username: Joey4420 Post Number: 169 Registered: 04-2003 |
If you check the archives you will find that this has been talked about alot.. In my Disco I, If I run anything less then 92 octane, I put in some Lucas Upper Cylinder Lubricant. | ||
| R. B. Bailey (Rover50987) Senior Member Username: Rover50987 Post Number: 637 Registered: 07-2002 |
I have used regular mainly for $ reasons. The truck runs fine, but not as well as with 92, which I do use when camping or towing - you can tell the difference in less engine knock and a little smoother - which seems to translate into more power - but it is probably just perception. | ||
| Randall Smith (Mr_smith) Member Username: Mr_smith Post Number: 59 Registered: 04-2003 |
Why do they even sell mid-grade gas?? Does any car require mid-grade? The Octane rating only goes up 2 points for mid-grade. Do they actually have a third underground tank for mid-grade, or is it blended at the pump?? Randall | ||
| Scott Hayes (Scott_h) Member Username: Scott_h Post Number: 61 Registered: 02-2002 |
If I dont run premium mine knocks and starts to shudder a bit while cruising...95 disco. For some folks regular works, for mine it doesn't. | ||
| Kyle Porter (Higgins) New Member Username: Higgins Post Number: 36 Registered: 03-2003 |
If I use low grade my truck starts to rust...more If I use mid grade the electrics stop working If I use premium the electrics stop working, the truck starts to rust and I run out of money  | ||
| Shaun Power (Shaunp) Member Username: Shaunp Post Number: 155 Registered: 05-2003 |
What is the octane of US fuel. I see people commenting on using fuel lower than 92. 92 is standard in OZ and most of the High octane stuff is 98 now | ||
| Danno (Danno) Senior Member Username: Danno Post Number: 255 Registered: 08-2002 |
in the US there is 86, 87, 89, 92, 93 and 94. you can also find 100 and 104 at certain stations. these are (R+M)/2 ratings | ||
| Dean Brown (Deanbrown3d) Senior Member Username: Deanbrown3d Post Number: 777 Registered: 02-2002 |
Mid grade is just a mixture of regular and premium, according to Hess. |
