[halfelite]

Now that its getting 105+ outside my oil mobile1 5w30 is no longer holding, im thinking about trying a 10-30 to see if it stands the heat. Right now i have lost 8psi on my oil pressure when its hot out so idle is like 14psi and wot is only getting 80psi no were close to normal. I kept thinking it was just getting to low as an oil change would fix the problem for a little bit but it keeps coming back and im not burning an more oil then i do during the winter.

[Turbo_Joe]

I'm running Mobil 1 10w30 during these hot Florida months. No problems, oil pressures are fine.

[n2oiroc]

mobil makes a 0W40 full synthetic.

[bdpakaknox]

10w30 Amsoil.
UOA's come back fine.

[Spoolin415]

105? I'd go with a 40 or 50. I'm running Eneos 5w40 and its great, but it hit 90 here (hot as !@#$ for the bay area) and I noticed my oil pressure running a bit lower than I like.

[bzbuzz]

shell rotella t 5w40 unless you have cat

[04_Sti_Blue]

Originally Posted by bzbuzz

shell rotella t 5w40 unless you have cat

I use shell rotella 5w-40. why do you say unless you have a cat? i have stock dp with hks catback

[n2oiroc]

Originally Posted by 04_Sti_Blue

I use shell rotella 5w-40. why do you say unless you have a cat? i have stock dp with hks catback

if you burn a massive amount of oil (1qt/500 miles or more) diesel oils can kill the cats. with normal consumption its not a problem.

[05STiOwner]

Originally Posted by halfelite

Now that its getting 105+ outside my oil mobile1 5w30 is no longer holding, im thinking about trying a 10-30 to see if it stands the heat. Right now i have lost 8psi on my oil pressure when its hot out so idle is like 14psi and wot is only getting 80psi no were close to normal. I kept thinking it was just getting to low as an oil change would fix the problem for a little bit but it keeps coming back and im not burning an more oil then i do during the winter.

Use Royal Purple 10w30 for hot summer days!!! Work fine on my Sti, OP, OT, normal along with boost

[n2oiroc]

a 30wt is a 30wt. if your oil pressure is dropping when its hot and your oil is in good shape, run a 40wt. depending on the conditions the manual specs up to a 50wt.

[halfelite]

Alright so i need to get a 40wt to try then? will go shopping tomorrow for more oil

[n2oiroc]

Originally Posted by halfelite

Alright so i need to get a 40wt to try then? will go shopping tomorrow for more oil

i personally would run a 40wt in your weather. it sure wont hurt. if you dont like it, go back to a 30 wt next time. i doubt you will switch back though. just get a good synthetic and your all set. amsoil and mobil both make a 0W40 and a 5W40. i ran the amsoil powersports 0W40 in my stock motor and it ran great (until i busted a ringland, but that aint the oils fault!).

[JDM-STI]

I run Rotella 15-30 full time in my STI and LGT and don't use a drop.

[Howie STi]

If you are having problems with the oil you are running in your car being to thin in the summer. Because you are in SOCAL and the temp. out there dosn't drop below 0 deg that often in the winter you can run 10w30 or 10w40 for the oil pressure that you want. But on the other side of that coin the oil temp will go up the thicker you go in your oil choice.

Just a reminder the number after the "W" is the winter weight. So 10w30 is what I ran while I was living in San Diego and LA. year round. Make is your pref.

[subiesteye]

Originally Posted by halfelite

Now that its getting 105+ outside my oil mobile1 5w30 is no longer holding, im thinking about trying a 10-30 to see if it stands the heat. Right now i have lost 8psi on my oil pressure when its hot out so idle is like 14psi and wot is only getting 80psi no were close to normal. I kept thinking it was just getting to low as an oil change would fix the problem for a little bit but it keeps coming back and im not burning an more oil then i do during the winter.

i kow how you feel buddy..im up in victorville and its just at hot...10w30..and im good to go