Synthetic oil change intervals

ubersonic · 12 Aug 2011 at 13:28

Bit of a simple one, if I change from semi-synthetic to synthetic do I still have to change the oil/filter every 3000 miles or can I leave it longer? and if so any idea what would be a good change interval?

Thanks.

Raymond Lin · 12 Aug 2011 at 13:29

What does the manual say?

Simon · 12 Aug 2011 at 13:36

What car ?

ubersonic · 12 Aug 2011 at 13:36

Raymond Lin said:
What does the manual say?

Simon said:
What car ?

Its a 1990 1JZ-GTE Toyota Supra, completely stock.

Joshy · 12 Aug 2011 at 13:38

If this is regarding the Supra stick with the 3,000 mile intervals regardless of if you use semi or fully synt.

The truth is that you could PROBABLY get away with using a good, modern Semi synthetic oil for longer than the 5k km stated seeing how oil technology has advanced somewhat since 1990 when the engine was introduced, but for the sake of a few hundred/thousand miles in order to save a few quid I can't see the benafit of risking it

ubersonic · 12 Aug 2011 at 13:45

Joshy said:
If this is regarding the Supra stick with the 3,000 mile intervals regardless of if you use semi or fully synt.

The truth is that you could PROBABLY get away with using a good, modern Semi synthetic oil for longer than the 5k km stated seeing how oil technology has advanced somewhat since 1990 when the engine was introduced, but for the sake of a few hundred/thousand miles in order to save a few quid I can't see the benafit of risking it

Cool, thanks man, ill stick with the regular stuff then

pepsilol · 12 Aug 2011 at 13:47

Can I get in on this...
My manual says SAE 5w-30..and intervals are every 10k by the book.

Is this semi or fully ? I can get semi for £35 for 20L and fully is quite a bit more.

The local dealer uses Semi but not sure if they use it because of price of that is what supposed to be used.

Simon · 12 Aug 2011 at 13:51

3,000 miles is very short.

There will be no issue taking that out to 6,000 or even 9,000 on a modern synthetic oil.

Dr. Pain · 12 Aug 2011 at 15:14

Simon said:
3,000 miles is very short.

There will be no issue taking that out to 6,000 or even 9,000 on a modern synthetic oil.

Careful, you're starting to sound like Opie Oils!

Simon · 12 Aug 2011 at 15:49

Dr. Pain said:
Careful, you're starting to sound like Opie Oils!

There is a bit of a difference between me and him. Plus someone selling oil would want these OTT 3,000 mile changes.

Django x2 · 12 Aug 2011 at 15:52

Is this the supra that's not had it's brake fluid changed in 21 years? I think you should change that as often as the oil by the sounds of it

helpimcrap · 12 Aug 2011 at 17:05

Lucero said:
Is this the supra that's not had it's brake fluid changed in 21 years? I think you should change that as often as the oil by the sounds of it

quite... bake fluid is hydroscopic isn't it so absorbs water? oil doesn't unless the head gaskets gone...

FWIW i change the fully synthetic oil on my race motorbike every 3 days use!

comes out black........ still going strong after 5 years race use though!

hillbilly2 · 12 Aug 2011 at 18:34

helpimcrap said:
quite... bake fluid is hydroscopic isn't it so absorbs water? oil doesn't unless the head gaskets gone...

FWIW i change the fully synthetic oil on my race motorbike every 3 days use!

comes out black........ still going strong after 5 years race use though!

Going through a wet clutch?