Quick Summary:
- Check the fuel door sticker, it states the minimum octane required.
- At Orlando pumps, 87 is regular, 89 mid-grade, 93 premium.
- If unsure, use the minimum listed octane, never below it.
- For flex-fuel cars, follow the cap label, not the pump marketing.
Pulling into an Orlando petrol station can feel unfamiliar if you are used to UK labels. Instead of “E10” or “premium unleaded”, you will usually see three big numbers on the pump, 87, 89 and 93. Those numbers are octane ratings, and choosing the right one matters for your car hire, because it affects engine performance, efficiency and in some cases warranty requirements.
The good news is that you do not need to guess. Your hire car will tell you what it needs, and US pumps are straightforward once you know what the numbers mean. This guide shows exactly where to confirm the required octane on the vehicle, how to translate 87/89/93 into a sensible choice, and what to do if the pump offers grades or wording you do not recognise.
What 87, 89 and 93 mean in the US
In the US, the number on the pump is the Anti Knock Index (AKI). It is displayed as a large two digit number, commonly 87 (Regular), 89 (Mid-grade) and 93 (Premium), though some stations show 91 instead of 93.
If you have heard of RON (Research Octane Number) in the UK and Europe, do not try to match the US number directly to UK pump numbers. The US uses a different labelling method, so the figures look lower. What matters is simple, match what your car’s label asks for in US terms.
Most mainstream Orlando rental cars, particularly compact and mid-size petrol models, are designed to run on 87 AKI. Some turbocharged or performance models may require 91 or 93. Hybrids that use petrol typically also accept 87 unless otherwise stated.
Where to confirm the required octane on your hire car
Do not rely on what a friend uses or what a pump attendant suggests. Check the car itself. In a typical US-spec rental car, you can confirm the minimum octane in these places:
1) Inside the fuel filler door. Open the fuel door and look for a sticker or printed label. It often says “Unleaded gasoline only” and then “87 octane minimum” or “91 octane required”. This is the fastest and most reliable source.
2) On the fuel cap. Some vehicles print the minimum octane on the cap itself. If the car has a capless system, look for the nearby label.
3) Driver’s door jamb sticker. Occasionally the manufacturer includes fuel guidance near tyre pressures. It is less common than the filler door label, but worth a glance if you cannot find anything by the filler.
4) The owner’s manual. In a hire car, the manual may be in the glovebox or as a digital menu on the infotainment screen. Search for “fuel” or “octane”.
Once you have found the minimum, treat it as your baseline. You can usually put a higher octane in without immediate harm, but you should not go below the stated minimum.
If you are collecting at the airport and want Orlando-specific rental tips alongside fuel basics, see the Hola guides for car rental at Orlando MCO and car rental from MCO to Disney area.
Which grade should you choose at Orlando pumps for most rentals?
Use the minimum octane shown on the car’s label. That single rule answers the title question in almost every situation.
If the label says 87 minimum, choose 87 (Regular). This is the most common requirement for everyday rental cars in Orlando and is typically the best value.
If the label says 89 minimum, choose 89 (Mid-grade) or higher. Mid-grade is less common as a minimum, but some engines specify it.
If the label says 91 or 93 required, choose the nearest match at the pump. If the station offers 93, use 93. If it offers 91 instead, use 91. Do not drop to 89 as a substitute if it says required.
If it says “recommended” rather than “required”, you can normally use 87 without damage, although you may notice reduced power, lower fuel economy, or more engine noise in hot conditions. For a holiday driving mix of highways and theme park traffic, many drivers still choose the recommended grade for smoothness, but it is not mandatory unless the wording says required.
What to do if the pump only offers unfamiliar grades
Most Orlando stations offer 87/89/93, but you may also see 88, 90, 91, or labels like “Super”, “Premium” and “Ethanol”. If you are unsure, follow this process:
Step 1, find the octane number first. Marketing names vary by brand. The octane number is the key. Match it to the minimum on the car’s sticker.
Step 2, do not confuse ethanol with octane. A pump might show ethanol content (often up to 10% in regular unleaded). Ethanol percentage is not the octane rating. Focus on the 87/89/93 number.
Step 3, if 93 is not available. Some stations cap at 91. If your car requires premium and the label states 91 minimum, 91 is fine. If it states 93 required and only 91 is available, it is better to find another station. In tourist areas you are rarely far from another option.
Step 4, avoid “race fuel” or unusually high octane. Specialty pumps with very high octane are not typical for standard rentals and usually offer no benefit for normal engines. Stick to mainstream grades unless the car label explicitly requires otherwise.
Common hire car scenarios and the right response
You picked 87 but later noticed “Premium recommended”. Do not panic. Recommendation is not a requirement. If you prefer, switch to premium at the next fill. One tank of 87 in a car that recommends premium is usually fine.
You accidentally used 89 instead of 87. That is generally not an issue. Higher octane than required is usually safe, just more expensive.
You cannot find any octane label. Check inside the fuel door again with a torch from your phone, then the cap area, then the manual. If you still cannot confirm, 87 is the most common minimum for non-performance rentals, but the best practice is to contact the rental provider for the specific model. If you are renting via a recognised brand at MCO, provider pages like Budget in Orlando or Hertz near Disney and MCO can help you identify who to contact and what you have booked.
The pump shows “Diesel” as well. Many US stations have diesel on the same island, often on a green handle. Only choose diesel if your hire agreement and fuel door clearly state diesel. Most Orlando rentals are petrol, but some SUVs and vans can be diesel in certain fleets.
How to read the pump and avoid simple mistakes
US pumps can look busy, but the steps are consistent across stations.
Choose your grade before lifting the nozzle. Some pumps require you to select 87/89/93 first, others let you lift the nozzle and then press the grade button.
Confirm “Unleaded”. Petrol grades are typically labelled “Unleaded”. Diesel is clearly labelled separately.
Ignore detergent claims and brand slogans. “With Techron”, “Nitro”, “V-Power” and similar names do not change the octane requirement. Pick based on the number and your car label.
Pay at the pump, or prepay inside. Many stations authorise a higher amount on your card and then settle the final amount. If the pump asks for a ZIP code and you have a UK card, it may not accept it. In that case, pay inside and tell the cashier the pump number, then return to fuel.
Does using higher octane improve anything on a rental?
If your car requires 87, using 93 usually does not add power or efficiency, because the engine is not tuned to take advantage of it. Modern engines adjust timing, but they cannot fully turn a regular-fuel engine into a premium-fuel engine. You typically just pay more per gallon.
Where higher octane helps is when the engine is designed for it, such as some turbocharged models, performance trims, and certain luxury vehicles. In those cases, using the required premium can prevent knocking, maintain power on hot Florida days, and keep the engine running smoothly in stop start traffic around International Drive.
Flex-fuel, E15 and other labels you might see
Some US vehicles are “FlexFuel” (often E85 capable). That does not mean you should automatically choose high ethanol blends. Your hire car’s fuel door will state what is permitted, for example “E85” or “Unleaded gasoline only”.
E10 (up to 10% ethanol) is very common in regular petrol in Florida and is usually fine unless the car label says otherwise.
E15 (up to 15% ethanol) may be offered as “Unleaded 88”. Do not use it unless the vehicle explicitly permits E15. Many newer cars can accept it, but not all, and a rental fleet may include mixed ages and engine types.
E85 is a high ethanol blend. Only use it if the car is clearly marked FlexFuel and says E85 is allowed. If you are uncertain, choose standard unleaded meeting the octane requirement.
How fuel choice fits into your overall Orlando driving plan
Fuel stops in Orlando are usually quick, but planning helps. If your itinerary includes toll roads and longer days out, you may refuel more often than you expect. Knowing the required octane means you can pick a station based on convenience and price rather than hesitating at the pump.
If you are comparing vehicle types, remember that larger vehicles can have different fuel requirements. A people carrier or large van may still take 87, but it is wise to check. For travellers needing extra space, Hola also covers van hire at Orlando MCO, where fuel considerations are part of choosing the right vehicle category.
Finally, keep your receipt if your rental agreement asks for proof of refuelling before return. Some return policies are strict about bringing the tank back to the same level, and a receipt can help resolve disputes.
FAQ
Is 87 in Orlando the same as 95 in the UK? Not directly. The US uses AKI while the UK uses RON. Follow the octane number shown on your car’s fuel door label in US terms.
My hire car says “premium recommended”. Do I have to buy 93? No, recommended means it can run on lower octane, usually 87. You may notice smoother performance with premium, but it is optional unless it says required.
What if I put 87 in a car that requires 93? If it is a small amount, top up with 93 as soon as possible and drive gently. If you filled the tank, contact the rental provider for guidance, and avoid hard acceleration.
Why do some stations have 91 instead of 93? Fuel grade availability varies by brand and region. If your car requires 91 minimum, 91 is fine. If it requires 93, find a station offering 93.
Do I need to worry about ethanol in Orlando petrol? Regular unleaded often contains up to 10% ethanol, which most modern cars accept. Avoid E15 or E85 unless the fuel door label explicitly permits it.
