Oil for 1.4 petrol engine

[bogstandard]

Hi

What is the best oil to use for a Seat 1.4 petrol engine (75 PS)? The manual says VW 500 00/501 01/502 00. Is 500 00 better than 502 00? I topped up with Castrol GTX Magnatec (500 00), but am interested in Repsol Multiválvulas (502 00).

Also, does anybody know where in the UK I can get hold of Repsol oil? Alternatively, what brand do people recommend? The car is a Seat Ibiza 1.4S, registered October 2003.

Thanks

[bogstandard]

To reply to my own question - my local dealer uses Shell Helix Plus 10W/40 - a semi-synthetic oil meeting 500 00. The specs of this seem to match those of Castrol GTX Magnatec, and at a lower price. I take it there is no benefit in using a fully synthetic oil in the 1.4 engine? (I do go up to 5000 rpm when accelerating - warmed up engine however.)

Is there a 502 00 oil available in this country, and how does it differ to 500 00?

[BeezerDiesel]

Chuck any old thing in as long as it's changed faily often you won't have too many problems with modern oils.
Semi-synthetic is fine in a normally aspirated engine.
It's the PD diesels (and 20vt's to a lesser extent) that are fussy.
The PD's need good oil for their injector systems and anything with a turbo needs oil with a good high temperature rating.
Personally I'd rather have reasonable quality oil changed more frequently than ultra-expensive oil changed once a year or so.