Join Talk Quesada
Welcome to Talk Quesada! My name's Alex and this is my website all about Ciudad Quesada in Spain. Talk Quesada is free to sign up and use so register below!
95 or 98 octane unleaded fuel - Which is the best to use?
Re: 95 or 98 octane unleaded fuel - Which is the best to use
by Babu » Thu Sep 06, 2018 7:56 pm
My mechanic back home told me that when you have a service the car is tuned to the fuel you have in it at the time so changing it isn't the best thing to do . . Going back a few years the advice was to keep to the same brand of petrol as say, BP was different slightly to Esso etc. But these days most stations, even the likes of BP etc. Get their supply from the cheapest option at the time so you can't tell . . If your car runs a bit lumpy change the place you get it from rather than the octane . .
- Babu
- Posts: 911
- Joined: Thu Mar 24, 2016 10:25 pm
- Which part of Spain are you from?: El Raso
- Gender: Male
Re: 95 or 98 octane unleaded fuel - Which is the best to use
by richardlionheart » Thu Sep 06, 2018 10:07 pm
Ok some good answers, but not precise.
Octane rating is a measure of a fuel's ability to resist ‘knock’. The octane requirement of an engine varies with compression ratio, geometrical and mechanical considerations and operating conditions. The higher the octane number the greater the fuel’s resistance to knocking (pinking, or pre-igintion). As the mixture compresses, it may detonate prematurely, rather than ignite and burn, ie before the optimum compression has been reached. This creates a shock wave in the cylinder, and this shock wave can, over thousands of miles, damage the valve seats, because it causes excessive heating of the cylinder.
Your engine is set up to use a specific octane, you should check what it is in the user manual. Putting 95 octane in an engine set up for 98 will provide reduced power, whilst putting 98 in a 95 may cause pinking. either way the engine setup may need adjusting to prevent pinking.
The old Sierra 2.0L with the Pinto petrol engine were staggeringly adaptable. Several time when there were petrol shortages in Uk, i ran it on a mix of half 98 octane and half diesel. It pretty much worked, just wasnt as nippy....
On the other hand, my father was an engineer, he used to design prototype oil and diesel engines, and gas turbines. He designed a crude oil engine for the middle east that would run on anything from Crude oil straight out the ground to neat vodka, with some adjustments.
Octane rating is a measure of a fuel's ability to resist ‘knock’. The octane requirement of an engine varies with compression ratio, geometrical and mechanical considerations and operating conditions. The higher the octane number the greater the fuel’s resistance to knocking (pinking, or pre-igintion). As the mixture compresses, it may detonate prematurely, rather than ignite and burn, ie before the optimum compression has been reached. This creates a shock wave in the cylinder, and this shock wave can, over thousands of miles, damage the valve seats, because it causes excessive heating of the cylinder.
Your engine is set up to use a specific octane, you should check what it is in the user manual. Putting 95 octane in an engine set up for 98 will provide reduced power, whilst putting 98 in a 95 may cause pinking. either way the engine setup may need adjusting to prevent pinking.
The old Sierra 2.0L with the Pinto petrol engine were staggeringly adaptable. Several time when there were petrol shortages in Uk, i ran it on a mix of half 98 octane and half diesel. It pretty much worked, just wasnt as nippy....
On the other hand, my father was an engineer, he used to design prototype oil and diesel engines, and gas turbines. He designed a crude oil engine for the middle east that would run on anything from Crude oil straight out the ground to neat vodka, with some adjustments.
- richardlionheart
- Posts: 611
- Joined: Fri Feb 23, 2018 3:23 pm
- Location: not cold grey expensive police state UK, thank god.
Re: 95 or 98 octane unleaded fuel - Which is the best to use
by Redphill » Fri Sep 07, 2018 8:10 am
98 Ron is for performance engines, if you are running a Ferrari, Porsche or similar then it is better. Newer (every day) vehicles are designed to run on much lower Ron numbers,we was in the USA this year and they have introduced fuel that has a high percentage of ethanol, burns more lean, lower emissions and costs much less not long before its rolled out in Europe hopefully.
- Redphill
- Posts: 22
- Joined: Tue Aug 26, 2014 7:23 pm
- Which part of Spain are you from?: Rojales Hills
- Gender: Male
Re: 95 or 98 octane unleaded fuel - Which is the best to use
by Roach » Fri Sep 07, 2018 1:20 pm
richardlionheart wrote:Ok some good answers, but not precise.
Octane rating is a measure of a fuel's ability to resist ‘knock’. The octane requirement of an engine varies with compression ratio, geometrical and mechanical considerations and operating conditions. The higher the octane number the greater the fuel’s resistance to knocking (pinking, or pre-igintion). As the mixture compresses, it may detonate prematurely, rather than ignite and burn, ie before the optimum compression has been reached. This creates a shock wave in the cylinder, and this shock wave can, over thousands of miles, damage the valve seats, because it causes excessive heating of the cylinder.
Your engine is set up to use a specific octane, you should check what it is in the user manual. Putting 95 octane in an engine set up for 98 will provide reduced power, whilst putting 98 in a 95 may cause pinking. either way the engine setup may need adjusting to prevent pinking.
The old Sierra 2.0L with the Pinto petrol engine were staggeringly adaptable. Several time when there were petrol shortages in Uk, i ran it on a mix of half 98 octane and half diesel. It pretty much worked, just wasnt as nippy....
On the other hand, my father was an engineer, he used to design prototype oil and diesel engines, and gas turbines. He designed a crude oil engine for the middle east that would run on anything from Crude oil straight out the ground to neat vodka, with some adjustments.
My manual just says use at least a 95 octane or higher. I suppose next time i'll fill up with 98 and see what benefits (if any) i get.
-
Roach - Posts: 500
- Joined: Mon May 08, 2017 10:38 am
- Which part of Spain are you from?: San Miguel
- Gender: Male
Re: 95 or 98 octane unleaded fuel - Which is the best to use
by earlybay » Fri Sep 07, 2018 1:33 pm
I remember using 2 star leaded petrol (very cheap) many , many years ago !
-
earlybay - Posts: 501
- Joined: Fri Aug 12, 2016 10:03 am
- Which part of Spain are you from?: Alicante
- Gender: Male
Page 2 of 2 • 1, 2
15 posts
• Page 2 of 2 • 1, 2
Related topics
-
- Similar Topics
- Replies
- Views
- Last post
-
-
Fuel discount
by Dave c » Thu Aug 10, 2023 9:57 am in Quesada general discussion - 3
- 364
-
by jpeg
Fri Aug 11, 2023 9:09 am
-
Fuel discount
Who is online
Users browsing this forum: colint and 2 guests
Login
Find in Quesada
Quesada pages
Quesada discussion
- Quesada general discussion
- Banking and finances
- Broadband, Wifi, Phone and TV
- Buses and public transport in and around Quesada
- Driving to Spain / Car hire in Spain / Buying and owning a car in Spain
- Fiestas in Quesada
- Flights, baggage and airports
- Health services in Quesada
- Insurances and wills in Spain
- Items for sale and wanted in and around Quesada
- Interesting articles about Spain
- Jobs and careers in Quesada
- Lost and found in Quesada
- Market days
- Places to go for free Wi-Fi
- Recommended restaurants / cafes / bars
- Recommended Tradesmen and Companies
- Residency in Spain: padron, residencia and passport advice
- Safety / security information and property in Spain hints and tips
- Taxes in Spain: Suma, NIE and general tax advice
- Taxis in Quesada
- Things to do and places to go in and around Quesada
- Utilities in Spain: Electric, gas and water recommendations and advice
- Weather in Quesada
- Where to buy things in and around Quesada
- Where to hire things in and around Quesada
Properties discussion
Businesses and places in Quesada
- Bars and pubs in Quesada
- Beaches near Quesada
- Beauticians / Beauty salons in Quesada
- Bedding and soft furnishings shops in Quesada
- Butchers in Quesada
- Car dealers in Quesada: new and used car dealers
- Car garages, mechanics, tyre fitter centres in Quesada
- Car hire in Quesada
- DIY / Bricolage / Ferreteria stores in Quesada
- Equipment hire centers in Quesada
- Estate agents in Quesada
- Furniture shops in Quesada
- Garden centres and garden furniture shops in Quesada
- Golf Courses in Quesada
- Grills / gates / metal items shops in Quesada
- Hairdressers in Quesada
- Hotels, guest houses and bed and breakfasts in Quesada and nearby
- Internet service providers that cover Quesada
- Launderettes / dry cleaners in Quesada
- Markets in Quesada
- Medical / Health centers in Quesada
- Pet shops in Quesada
- Pharmacies / Chemist shops in Quesada
- Restaurants in Quesada
- Shopping centres in Quesada
- Sports centres and gyms in Quesada
- Supermarkets in Quesada
- Swimming pool services in Quesada
- Town Halls (Ayuntamientos) in Quesada
- Waterparks/Aquaparks in Quesada
- TalkQuesada » Board index
- The team • Delete all board cookies • All times are UTC [ DST ]
- Our other websites:
- Costa Blanca forum
- Costa Calida forum
- Costa del Sol forum
- Costa de Almeria forum
- Costa de la Luz forum
- Costa Dorada forum
- Costa Brava forum
- UK forum
- Jobs in the UK
- Our policies:
- Privacy policy
- User agreement
- Content policy
- Website created and operated by JSM Forum Websites