Plus or Premium gas for 95

[Jahmusac]

Plus or Premium gas for 95 RRC 100,000 miles.

[BullDogSix]

You will get answers for both premium and regular (unleaded). The manual says something like 92...but that depends on how it's calculated, and it's figured differently in the UK (RON) than here.

The sticker on the inside of my fuel door says unleaded...so that's what she gets...unleaded. I have not driven mine enough yet to experiment with premium to see if pays off with better MPG. At the moment I'm getting a combined of around 17-18 MPG with regular 87 octane (R+M/2) which is equal to about 91-92 (RON) for Europe. That matches what the owners manual says, so I say I'm good.

See here: Octane rating - Wikipedia, the free encyclopedia for more info.

[ArmyRover]

unleaded 87 that's it.

I put premium in it for a few tanks once noticed no increase in power or mileage so 87 it gets.

[Jahmusac]

Yeah that sounds about right. ill probably start doin that now.

Thanks Guys!!

[SafariDave]

I tried a 1/2 tank of 87 did not notice any change in performance. I took a look at my 1990 Range Rover Manual and it says Premium 90/92 AKI - RON (England) 95. Not to put in any lower than 90/92 AKI. I think you guys read the manual wrong when you read 90/92 RON it's 95 RON.

[ArmyRover]

nope never read the manual just gave it 87 and called it a day.

[jackassisadgk]

I'm tossin in the premium I don't see any harm even with gas prices high I'd rather have my piece running cleaner. what it comes down to is how long do you want the engine to last? my '00 disco says to put in premium and for the extra twenty cents I'd rather save the hassle. The seals on the pistons in my mom's '02 saab 95 literally disintegrated after filling up with regular gas. I am aware of the distinct difference; however Our mechanic said it's better to run something that burns cleaner. If you're driving one of these cars it's worth putting in the extra money just to keep it running well.

[ArmyRover]

Originally Posted by jackassisadgk

I'm tossin in the premium I don't see any harm even with gas prices high I'd rather have my piece running cleaner. what it comes down to is how long do you want the engine to last? my '00 disco says to put in premium and for the extra twenty cents I'd rather save the hassle. The seals on the pistons in my mom's '02 saab 95 literally disintegrated after filling up with regular gas. I am aware of the distinct difference; however Our mechanic said it's better to run something that burns cleaner. If you're driving one of these cars it's worth putting in the extra money just to keep it running well.

oh wait your serious... almost 160k on a fine running original motor.

To each their own We're also talking about the older Rover engines here.

Oh and I was outside so I looked and my rover sticker inside the gas door says regular unleaded.

[p76rangie]

I think you should first determine whether your motor is a high or low compression version. Low compression only requires standard unleaded, the high compression requires premium.
The compression ratio is stamped on your engine block right above your engine number. This is located where your oil dip stick enters the block.

[BullDogSix]

The seals on the pistons in my mom's '02 saab 95 literally disintegrated after filling up with regular gas.

My bet is she was getting E85 ethanol for gas...I don't care if its corn based and environmentally blah blah...that crap will ruin a normal engine quicker than not changing the oil! The ethanol will eat the seals...The only thing lower octane will do(to my knowledge) is kick in the knock sensor and cause the computer to compensate therefore giving you crappy mileage (possibly increase wear...depends on the motor) . Now if you've got a FLEX FUEL engine different story...they are made to run E85.

BTW...seals...pistons????? I think you mean...valves

[ArmyRover]

actually most turbo 4 cyl saab motors die from sludge problems. It is a well documented and long lamented issue for the motors.

[BullDogSix]

Sludge problem?...as in oil type and change intervals?

[SafariDave]

I am going to check on my engine to see if it reads low compression or high compression. I purchased my RRC from a Land Rover mechanic and the first thing he told me was to use Premium Gas. I ran it with 89 for 7 months then I changed to Premium and it ran smoother. Them I tried 87 and it feels the same, but again after reading the manual I am going back to Premium. This is my every day work car my girlfriend and I drive at least 30 to 40 miles a day and it has 186500 miles now, it's been the most reliable car I have ever had. It's not in perfect conditions, but it never lets us down! This is by far the best car I've ever had. I had Volvo (repairs every month), a Ford (junk), and a Cherokee Jeep (piece of junk, seats suck & always lets me down, I still have it). I love my Range Rover Classic!

[SafariDave]

ArmyRover the sticker says Unleaded ( I did not see where it says Regular Unleaded) We have the same model Rover 1991 any pics?

[ArmyRover]

Originally Posted by BullDogSix

Sludge problem?...as in oil type and change intervals?

not so much either of those. It's more of a situation with location of the exhaust pipe being close to the oil pan and the turbo cooking the oil on top of it causing sludge build up in the pan and head. It ends up restricting oil flow causing catostrophic engine failure. SAAB NA has been covering replacement engines on ones with a complete service history upwards of 100k for sludge failures.

I'll take some pics of the fuel door sticker later today after the wife and daughter get back from the childrens museum with the camera.