Info needed - synthetic oil choice

Hey everyone -
I'm finally ordering my SCT tuner through brenspeed. I have shorties and an H-pipe - cherry bombs (like the 40 flows) and mutha thumpers stage II cams - the car has been sitting for a long time - so I'm thinking of switching it over to synthetic - before the tune arrives- now I'm thinking either Moblie 1 or royal purple full sythetic - w/a Motorcraft filter - what grade do I buy - I live in AZ so I'm thinking I should get the 5-20 - any thoughts would be great.

Thanks guys - I didn't mean to stir up a Hornets nest here - I usually always leaned torwards Moblie 1 full syn - but I have blow by lockouts on my VCT - and from what I have heard that if your re-building an engine you should lube it with the royal purple - that's how good it is - I've looked through the related threads and posts - and your right .....it's All over the place- synthetic vs conventional / grade / filter etc etc...thanks for the info on the Ford racing filter - since the car basically sits for most of the week - it may be worth the extra $$

Yes I think your correct - I've been looking on not only other mustang sites but on the web pages of Mob 1 and RP - my car has 18K on conventional oil - so everything should be seated correctly - I'm going with the 5W-20 full synthetic - the best page I found was a guy who popped out his cams after 90K - using mobile 1 for it's whole life - lots of scars / markings - then another guy popped out his cams after 30K - using mobile 1 and they looked the same - then a guy running RP popped his out and they were 'clean' as a whistle - don't they use RP in the shelbys / 500 / super snakes - I thought I saw a commerical with Carrol himself pouring RP down the spout.....

Thanks.....I plan on RP - 5W-20 w/a motor craft filter for the switch - I'll probably up-grade to that ford racing filter after the second change (Thanks for the info on that) .....I was thinking on switching the grade b/c of the AZ heat out here - emailed Royal purple -the response is below - after my return


Thank you Chris for your prompt and informative response – great info – I’m going to stick w/the RP 5W-20 – after reviewing a lot of back and forth on the blogs and doing my own

research I’m very confident in RP’s product – sorry for all of the “hub bub” – but with over $47k invested in this plain old GT – not to mention all of the cracked knuckles – and my

wife digging shallow graves for me in the backyard every time a parts box comes in the mail – I know that the switch to synthetic is big a choice – and now one I’m sure I won’t regret

……(isn’t there an RP commercial w/ Carroll Shelby pouring RP into a ‘super-snake’ ?) – but really what sold me was on a blog – long story short – a kid yanked (3) three sets of cams

out of my years mustang – for switch overs – 1st – 90k using Mobile 1 – scarring / marks – the 2nd – 33K – mobile 1 – same thing (it was a check) – the last one 60K – using RP –

looked brand new – no marks etc etc ……so I’m off to auto zone to pick it up …thanks for the parts ##’s….take care
Frank



From: Chris Barker [mailto:CBarker@royalpurple.com]
Sent: Tuesday, March 30, 2010 7:05 PM
Subject: RE: 2007 Mustang GT

Good Evening

I don’t think moving to 10W-30 would hurt, but your engine is designed to use the 5W-20. Ambient air temperature does play a role in choosing the correct viscosity, but other significant factors are the design of the oil circuit/oil pump and the bearing clearances. In general, modern engines have been built with tighter tolerances to take advantage of the efficiency of lighter viscosity oils.

If you really feel the need to try a heavier viscosity, I would suggest starting with a 5W-30, and seeing what your oil pressure is like. Moving to a heavier viscosity oil will usually result in higher oil pressure, which is not good, in and of itself. Oil pressure is not a good indicator of lubricant protection, just a resistance to flow. Generally oil flow and oil pressure will be inversely proportional to each other (ex. As oil pressure goes up, oil flow goes down). Sufficient oil flow is critical not only for lubrication, but also to help remove heat from high temperature areas in the engine.

- Royal Purple SAE 5W-20 (part #01520, quart bottle)

- Royal Purple SAE 5W-30 (part #01530, quart bottle)

Hope I didn’t ramble too much. If you need clarification or more info, let me know.


Best Regards,

Christopher Barker
Tech Services
Royal Purple, Inc.
1 Royal Purple Ln.
Porter, TX 77365
281-354-8600

Not sure what the coil of a Hydraulic pusher means? -

Not sure - hopefully a person w/more technical resources can help you with this - I have owned alot of mustangs - but this is the first one I'm tearing into myself - learning and downloading everything as I go....