Petrol RON95 vs 98

[Guest jtang]

Been using Caltex RON 95 faithfully for 1.5 yrs since the day I colllected my merc W204 CGI. Last week the pump attendant mistakenly filled up with 98. I graciously accepted the mistake & thought "Why not try?"

After 1 tankful, this is my observation between the 2 petrols:

1) there is no differnce in power when pushed in the mid to high rpms.

2) the take off is slightly smoother with the 98

3) at slow speeds around car park ascending ramps, the gear box does not hunt for the right gear (1st gear) & can easily climb at crawling speed with 2nd gear.

4) I seem to get better mileage with 98...about 30km more with the full tank.

Conclusion:

Would you spend the extra $15-$18 for the same amount of petrol??

Though the extra mileage is negligible, the car does seem to be happier with the new juice. I'd say YES!

[Guest io5885]

Never feel happy with myself when i pump 95.

always rev to finish up the tank.

[Guest VBlaster_W211]

For normal Merc engines, there's no difference bet 95 and 98. Engines tuned for 95 will not benefit from higher octane. Usually any perceived differences are psychological.

Performance engines tuned for 98 will degrade it's performance when filled with 95 or 92. Usually by retarding the ignition cycle to lower risk of pinging.

[Guest io5885]

I agree.

Whether is it 92,95,98 or V-power, the different petrol does not make ur ride go faster.

U can only go as fast as your engine capacity is.

Guess we r looking more at the smoothiness of acceleration n drive.

Enhancements like performance spark plugs, high flow air filter, CAI, etc, optimise the engine performance, not increase engine performance.

Kindly correct me if i'm on the wrong track.

Bro VBlaster_W211,

Have u tried RON92?

cos my W204 min requirement is 91 but i not brave-hearted enough to try.

[Guest jtang]

I agree.

Whether is it 92,95,98 or V-power, the different petrol does not make ur ride go faster.

U can only go as fast as your engine capacity is.

Guess we r looking more at the smoothiness of acceleration n drive.

Enhancements like performance spark plugs, high flow air filter, CAI, etc, optimise the engine performance, not increase engine performance.

Kindly correct me if i'm on the wrong track.

Bro VBlaster_W211,

Have u tried RON92?

cos my W204 min requirement is 91 but i not brave-hearted enough to try.

I agree with you...& as mentioned in my post, the car does feel smoother though there's no discernible increase in power.

Which model is your W204? My min RON requirement as listed on the petrol cap is 95, not 91.

[Guest io5885]

C200K.

Minimum MON91.

Recommended RON95.

Prefer Esso98.

P.S. Doc, on my petrol cap, its written RON95 in the middle then next to it, (min 91).

[Guest kepiting1sg]

Guys!

A quick check on my soft copy of owner manual likely to solve the confusion!

If what I read is correct, both Bro Ivan & Jim are correct.

The manual reads:-

Gasoline Engines:-

unleaded gasoline (at least 91 octane, average value between 96RON and 86MON)

RON stands for Research Octane number

MON stands for Motor Octane Number

So 91 octane fuel is about equal to (RON+MON)/2 = (96+86)/2 i.e average of RON96 & MON86) =91 or know as the anti-knock index

So guys - Our car needs min RON95 and not RON92 or fuel octane number of at least 91

Do not confuse RON & Octane number

[Guest jon]

Just wanna koaypoh add abit.....

The octane level in the petrol does make a difference in the milleage.

A heavier car with RON95 achieved lower milleage compare to RON98.

[Guest hkhamateur]

Guys!

A quick check on my soft copy of owner manual likely to solve the confusion!

If what I read is correct, both Bro Ivan & Jim are correct.

The manual reads:-

Gasoline Engines:-

unleaded gasoline (at least 91 octane, average value between 96RON and 86MON)

RON stands for Research Octane number

MON stands for Motor Octane Number

So 91 octane fuel is about equal to (RON+MON)/2 = (96+86)/2 i.e average of RON96 & MON86) =91 or know as the anti-knock index

So guys - Our car needs min RON95 and not RON92 or fuel octane number of at least 91

Do not confuse RON & Octane number

Exactly bro. I knw bt didnt knw how to put into written. Tx u

[Guest skid]

hi all, haven't been on here in awhile. OT a bite the new forum look is really nice!

my exp with 95 or 98 yields similar mileage. since petrol price so high now, why waste the $$?

[Guest skid]

hi all, haven't been on here in awhile. OT a bit the new forum look is really nice!

my exp with 95 or 98 yields similar mileage. since petrol price so high now, why waste the $$?

[keltanky]

seriously 95 or 98 no diff..., just mindset la esp for our roads

got someone said to me b4, in SGP, why do you need 98? see the roads during Peak, why waste $$?

4 circles SE always fills 95. :whistle:

got a number of ppl also dare fill 92 for their HIGH RPM Vehicle lor!!

[Guest jtang]

I'm into my 2nd tank with Caltex 98. Seriously, I'm loving it. My car behaves better with this juice. All the quirky behavior that I presumed was normal for my car (since day 1 with Caltex 95) like gear hunting, mild jerks on low rpms around carparks are gone. Another observation that I made is the exhaust tip....there's no more carbon (black soot) at the bottom of the tip with 98, something that I routinely clean every week. This shows that 98 burns more cleanly, thus this explain why car feels smoother. The recent increase in petrol price dampens the fun though. :S

[Guest kepiting1sg]

My previous E250 >17k km alternating between Shell 95, 98 & VPower.

Shell 98 consistently gimme the best mileage!

[Guest TD042]

My previous E250 >17k km alternating between Shell 95, 98 & VPower.

Shell 98 consistently gimme the best mileage!

That what ah boon from auto sprite told me too. Guess i have to switch to that after i empty my fuel tanks. :whistle:

[Guest io5885]

My previous E250 >17k km alternating between Shell 95' date=' 98 & VPower. Shell 98 consistently gimme the best mileage![/quote']

That what ah boon from auto sprite told me too. Guess i have to switch to that after i empty my fuel tanks. :whistle:

Bro,

U mean switch to 98 OR switch to alternating of 95,98 n very Power?

Uncle Seah,

Y the need to alternate?

Worried abt over tonic ah?

[Guest kepiting1sg]

My previous E250 >17k km alternating between Shell 95' date=' 98 & VPower. Shell 98 consistently gimme the best mileage![/quote']

That what ah boon from auto sprite told me too. Guess i have to switch to that after i empty my fuel tanks. :whistle:

Bro,

U mean switch to 98 OR switch to alternating of 95,98 n very Power?

Uncle Seah,

Y the need to alternate?

Worried abt over tonic ah?

No Rojak lah Ivan!

After alternating, evaluating, confirmed, D & T confirm, final conclusion still the Shell 98 gip the force injection 1.8 engine best mileage!

I still have not conclude my current 3.0L NA engine.

[Guest LF918]

Hi all,

Does it mean Shell 98 better than Esso 8000,Caltex 98 etc???

[Guest kepiting1sg]

Hi all,

Does it mean Shell 98 better than Esso 8000,Caltex 98 etc???

This one no "research" cos I've been using Shell for decades.

To me petrol is like using toothpaste i.e never change brand cos used to it.

[Guest lightning]

Hi all,

Does it mean Shell 98 better than Esso 8000,Caltex 98 etc???

This one no "research" cos I've been using Shell for decades.

To me petrol is like using toothpaste i.e never change brand cos used to it.

Darlie (Darkie) or Colgate...

[Guest io5885]

Hi all,

Does it mean Shell 98 better than Esso 8000,Caltex 98 etc???

Bro,

Whats your definition of "better"?

better feel of acceleration, "cleaner" exhaust tip, better mileage, better-looking station specialist, etc

Some swear by Very Power. Some by Techron, Some like Tiger.

I used to pump Shell for the past 8 yrs and mostly V-power cos i believed in the mktg gimmick of keeping the engine clean.

Moreover, im using UOB plat card for 10% disc so happy happy pump Shell.

Recently, my friend's friend, Nissan pumps Shell then he lost his race to a blue Kia so he no pump Shell anymore. :silly:

Now i no money.

Apply Citibank Div card n pump Esso.

Better discount than Shell. LoLz

PS: The chinese missy at the cashier oso bery cute.

[Guest lightning]

Hi all,

Does it mean Shell 98 better than Esso 8000,Caltex 98 etc???

Bro,

Whats your definition of "better"?

better feel of acceleration, "cleaner" exhaust tip, better mileage, better-looking station specialist, etc

Some swear by Very Power. Some by Techron, Some like Tiger.

I used to pump Shell for the past 8 yrs and mostly V-power cos i believed in the mktg gimmick of keeping the engine clean.

Moreover, im using UOB plat card for 10% disc so happy happy pump Shell.

Recently, my friend's friend, Nissan pumps Shell then he lost his race to a blue Kia so he no pump Shell anymore. :silly:

Now i no money.

Apply Citibank Div card n pump Esso.

Better discount than Shell. LoLz

PS: The chinese missy at the cashier oso bery cute.

Bro Ivan...notti notti... just married less than 6 mths only :woohoo:

btw...I have switched to Tiger to support someone...you know who lah

i am using DBS Esso Card for 17% disc for my Esso 8000 and also entitle to Smile points :whistle:

[Guest kepiting1sg]

Bro Ivan...notti notti... just married less than 6 mths only :woohoo:

:

Ivan face has the notti notti look! Cannot siam one lah!

Darlie (Darkie) or Colgate...

Colgate from the day I learnt to brush my teeth, I even convert my wife from using Indon Pepsodent to Colgate

[Guest jtang]

Bro Ivan...notti notti... just married less than 6 mths only :woohoo:

:

Ivan face has the notti notti look! Cannot siam one lah!

Darlie (Darkie) or Colgate...

Colgate from the day I learnt to brush my teeth, I even convert my wife from using Indon Pepsodent to Colgate

IMexpertO, colgate is like RON95 nia, Darlie even worse...RON92. Try this one from France...Elgydium. It's the equal to RON98 or V power...some even say Total super diesel

[Guest kepiting1sg]

IMexpertO' date=' colgate is like RON95 nia, Darlie even worse...RON92. Try this one from France...Elgydium. It's the equal to RON98 or V power...some even say Total super diesel [/quote']

Doc Gigi!

We need Nitro!

Toothpaste hard to change brand lah just like your wife using washing detergent for washing your clothes.

BTW Does she use Mama Lemon for dish washing.....muhahaha!

When I was a child!

Darlie advert on rediffusion in Kantonese!

黑人牙膏亮!

IMHO RON98 is usually good for forced induction engine!