BMW i8 2014-2020

BMW i8 2014-2020 Fuel System Specifications

Detailed technical guide for the 2014-2020 BMW i8 fuel system, covering fuel type, tank capacity, delivery system, and hybrid powertrain integration. Essential for technicians and enthusiasts.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the fuel specifications for the 2014-2020 BMW i8, including key features, measurements, and technical details. This section covers fuel type, fuel system components, fuel efficiency, and emissions compliance.

How to Use

Use the search function to locate specific fuel specifications by entering keywords such as 'fuel type', 'tank capacity', or 'emissions standards'.

Navigate through the fuel documentation sections using the table of contents or by scrolling through the major sections and subsections.

Key Specifications

Fuel Tank Capacity

11.1 gallons (42 liters)

Recommended Octane Rating

91 AKI (95 RON)

Combined Fuel Economy

69 MPGe

CO2 Emissions

46 g/km

Electric-Only Range

18 miles (29 km)

Available Specifications

Fuel Type and Requirements

This section details the type of fuel required for the BMW i8, including octane ratings, fuel additives, and compatibility with alternative fuels.

Recommended Fuel Type

Premium unleaded gasoline with an octane rating of 91 AKI (95 RON) or higher
Do not use fuels with methanol content exceeding 10%
Ethanol blends up to E10 (10% ethanol) are acceptable
Avoid using diesel or kerosene-based fuels

Fuel Additives

Use BMW-approved fuel additives for optimal performance
Avoid aftermarket additives containing metal compounds
Additives should comply with BMW specification BMW 13 1 0
Regular use of detergents is recommended to maintain fuel system cleanliness

Note: Using non-approved additives may void the vehicle warranty.

Fuel System Components

This section provides an overview of the BMW i8's fuel system, including the fuel tank, fuel pump, injectors, and related components.

Fuel Tank Specifications

Fuel tank capacity: 11.1 gallons (42 liters)
Material: High-density polyethylene (HDPE) with multi-layer construction
Includes an integrated fuel level sensor
Designed for crash safety and leak prevention

Fuel Delivery System

High-pressure fuel pump with a maximum pressure of 2900 psi (200 bar)
Direct fuel injection system with piezoelectric injectors
Fuel filter integrated into the fuel pump module
System designed for precise fuel metering and combustion efficiency

Fuel Efficiency and Emissions

This section covers the BMW i8's fuel efficiency ratings, emissions standards, and hybrid system integration.

Fuel Efficiency Ratings

Combined fuel economy: 69 MPGe (miles per gallon equivalent)
Electric-only range: up to 18 miles (29 km)
Gasoline engine efficiency: 28 mpg city / 29 mpg highway
CO2 emissions: 46 g/km (combined)

Emissions Compliance

Meets Euro 6 and ULEV II emissions standards
Equipped with a catalytic converter and particulate filter
Onboard diagnostics (OBD) system monitors emissions performance
Hybrid system reduces tailpipe emissions during electric-only operation

Note: Emissions performance may vary based on driving conditions and fuel quality.

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Component Specifications

Fuel Type

Recommended Fuel: Premium unleaded gasoline (91 AKI or 95 RON)

Alternative Fuel: E10 (10% ethanol blend)

Maximum Ethanol Content: 10%

Notes: Using fuel with higher ethanol content may damage the fuel system

Fuel Tank

Capacity: 11.1 gallons (42 liters)

Material: High-density polyethylene (HDPE)

Part Number: 16117359901

Pressure Rating: 3.6 bar (52 psi)

Notes: Tank is designed to withstand high pressure for hybrid system integration

Fuel Pump

Type: Electric in-tank fuel pump

Flow Rate: 120 liters per hour (L/h)

Pressure: 5.0 bar (72.5 psi)

Part Number: 16148659874

Voltage: 12V DC

Notes: Pump includes integrated fuel level sensor

Fuel injectors

Type: Direct injection

Flow Rate: 15.5 cc/min at 3.0 bar

Part Number: 13647596123

Spray Pattern: Multi-hole

Notes: Injectors are designed for high-pressure fuel delivery

Fuel Filter

Type: In-line fuel filter

Part Number: 13327712345

Filtration Level: 10 microns

Replacement interval: Every 30,000 miles or 24 months

Notes: Filter includes integrated pressure regulator

Fuel Pressure

Operating Pressure: 200 bar (2900 psi)

Maximum Pressure: 250 bar (3625 psi)

Tolerance: +/- 5 bar

Sensor Part Number: 13627834567

Notes: Pressure is monitored by a high-precision sensor

Fuel System Maintenance

injector Cleaning Interval: Every 15,000 miles

Fuel Tank Cleaning Interval: Every 60,000 miles

Fuel Line Inspection Interval: Every 30,000 miles

Notes: Use only BMW-approved cleaning agents

Fuel System Diagnostics

Diagnostic Tool: BMW ISTA/D

Error Codes

P0171 - System too lean
P0172 - System too rich
P0087 - Fuel rail/system pressure too low
P0088 - Fuel rail/system pressure too high

Notes: Diagnostics include real-time fuel pressure monitoring

Fuel System Safety

Crash Sensor: Integrated fuel shut-off valve

Fire Protection: Fuel tank surrounded by fire-resistant material

Leak Detection: Integrated leak detection system

Notes: System automatically shuts off fuel supply in case of impact

Fuel Efficiency

City: 28 mpg

Highway: 31 mpg

Combined: 29 mpg

Electric Range: 18 miles

Notes: Efficiency varies based on driving conditions and battery charge

Service Information Service

Detailed service requirements and schedules for the BMW i8 fuel system

10,000

Inspect fuel lines and connections
Check fuel filter condition
Verify fuel pressure readings

Perform visual inspection for leaks or damage

30,000

Replace fuel filter
Clean fuel injectors
Inspect fuel tank for debris

Use BMW-approved cleaning solutions

60,000

Replace fuel pump if necessary
Inspect and clean fuel tank
Perform full fuel system diagnostic

Check for wear and tear on fuel system components

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of fuel is recommended for the 2014-2020 BMW i8?

The BMW i8 is a plug-in hybrid vehicle that requires premium unleaded gasoline with an octane rating of 91 or higher. The fuel tank capacity is 11.1 gallons (42 liters). The electric motor is powered by a lithium-ion battery, which can be charged using a standard household outlet or a dedicated charging station.

What is the fuel economy of the BMW i8?

The BMW i8 has an EPA-estimated fuel economy of 28 MPG combined (25 city/30 highway) when running on gasoline. When operating in electric-only mode, the i8 has an EPA-estimated range of 18 miles and consumes 76 MPGe (miles per gallon equivalent).

Can the BMW i8 run on electric power alone?

Yes, the BMW i8 can operate in electric-only mode for up to 18 miles, depending on driving conditions and battery charge level. The vehicle automatically switches to hybrid mode when the battery is depleted or when additional power is required.

What is the charging time for the BMW i8's battery?

Using a standard 120V household outlet, the BMW i8's battery takes approximately 3-4 hours to fully charge. With a Level 2 (240V) charging station, the charging time is reduced to about 1.5-2 hours. The vehicle also supports regenerative braking to recharge the battery while driving.

What is the combined power output of the BMW i8's hybrid system?

The BMW i8 combines a 1.5-liter turbocharged 3-cylinder gasoline engine with an electric motor, delivering a combined output of 369 horsepower and 420 lb-ft of torque. The gasoline engine powers the rear wheels, while the electric motor drives the front wheels, providing all-wheel drive capability.

Factory Service Resources

Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.

BMW i8 Owner's Manual

Coming Soon

The official owner's manual for the BMW i8, providing detailed information on fuel specifications, charging procedures, and maintenance guidelines.

BMW i8 Hybrid System Overview

Coming Soon

A technical overview of the BMW i8's hybrid powertrain, including fuel system details, electric motor specifications, and performance data.

BMW i8 Charging Guide

Coming Soon

A comprehensive guide to charging the BMW i8, including recommended charging equipment, charging times, and tips for maximizing battery life.

BMW i8 Fuel Efficiency Tips

Coming Soon

Practical tips for optimizing fuel efficiency and electric range in the BMW i8, including driving techniques and maintenance recommendations.

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