Mixing engine oils

1. Krys_23 Saxperience Post Whore Joined: Aug 2007 Posts: 6543

   #1 13th May 2011, 08:08

   Alright guys, i recently gave the car a service and somehow managed to lose two litres of silkolene pro s 5w40 oil
   
   So there's about two in the car, was just wondering would it really matter if i just put other 5w40 engine oil in with it, top it up to the right level with two different brands but both the same grade of oil?
   
   Surely two different 5w40's are better than any single semi synthetic?
   
   Cheers.
2. Gabbastard Saxperience Post Whore Joined: Dec 2002 United Kingdom Posts: 8390

   #2 13th May 2011, 11:19

   should be fine dude.I had to mix synth and semi before, never noticed anything wrong.
   
   I seem to remember reading something that if you mix oils, the better of the two will be drawn to the areas that most need it.
3. Krys_23 Saxperience Post Whore Joined: Aug 2007 Posts: 6543

   #3 13th May 2011, 14:31

   Cheers buddy, any 5w40 fully synthetic will do eh, cheers gabba.
4. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #4 13th May 2011, 18:49

   Never had a problem doing this either but I always mix the same stuff - Fully/semi synth and the same viscosity just a different brand
5. Krys_23 Saxperience Post Whore Joined: Aug 2007 Posts: 6543

   #5 13th May 2011, 18:52

   You mix semi with fully synth?
   
   I'm not too bothered i just want to make sure it doesnt harm the engine, i just want to hear it idling again
6. Gandi699 Saxperience Post Whore Joined: Apr 2011 Posts: 9100 Amazon green VTR 16v, Inferno RS clio 182

   #6 13th May 2011, 18:59

   I mix it like for like but you'll be fine mate. I'd swap it out though for any hard use, just for peace of mind.
7. Krys_23 Saxperience Post Whore Joined: Aug 2007 Posts: 6543

   #7 13th May 2011, 19:10

   Yeah think i'll just stick to putting some other 5w40 in then , wouldn't feel safe driving reasonably hard with a dodgy mixture, cheers.
8. Furioman Frequent Poster Joined: Jan 2004 Denny United Kingdom (Scotland) Posts: 666 Ford focus 2.0 Saxo VTS

   #8 14th May 2011, 01:10

   any oil is better than no oil