What are semi synthetic motor oils?

Shell Helix synthetic technology oils make use of both synthetic and mineral base stocks to achieve higher performance levels than can be formulated from mineral oils alone.

Semi synthetic motor oils help protect your engine.

Shell Helix semi-synthetic or ‘synthetic technology’ oils make use of both synthetic and mineral base stocks to achieve higher performance levels than can be formulated from mineral oils alone. With our active cleansing technology, Shell Helix synthetic technology motor oils go on cleansing and protecting to help keep your engine feeling like new, and they provide low oil for less frequent top up.