ive heard the only reason for the thin oil such as 5w-20 is for emissions purposes the same exact engines from a couple years ago reccomend 5w-30

 

I posted about this on nloc.org(your ?). First 2 changes were Motorsport 5W20. At 4,000, I went to Royal Purple #11 synthetic(5W20 racing oil). Use the K & N Gold filter. 15,000 miles now with no 'oil' related issues, just 2 cracked fog lites.

Dan

 

At 1000 miles. No problems.

 

I just put Royal Purple Racing 11 in at 2000 miles
So far no problems...but time will tell.
At 8 bucks a quart, it better get the job done

 

At 3000 miles I put the Royal Purple 21 Racing oil in. It runs so smooth and quiet. At idle all you hear is the injectors pulsing. So far so good. This stuff was $9.00 a quart! But she's worth the extra protection.

 

According to the Ford dealers, they suggest waiting until 5000 miles for switching to synthetic oils, to allow for proper break-in. But, many people here have switcher earlier with success.

Conventional motor oil consists of 3 molecule sizes. The smallest one burns off during normal operation. The 'ideal' size does the job. The large molecules help create a varnish effect on all the seals and gaskets to help prevent leaking, but also create sludge.
Synthetic oil is all the perfect size molecules, no small ones and no large ones.

 

Royal Purple is available at Holcomb Motorsports(910-739-0747) for $7.99/qt. + shipping. Quick service too.

Dan

 

I have to agree with Blackcobra on this one.The mod motors do keep (and need) the oil up in the head areas, and the lighter synthetics are ideal for their thinner and STRONGER viscosities.They are thin enough to maintain the all important flow requirements of a supercharged engine, as well as maintaining its weight composition (hardly no thermal breakdown or thickening) for improved protection.I do also agree that the switchover should be after the first TWO oil changes.I was an Amzoil dealer and this is what they spoke about (in much more technical terms) at many of our Monthly meetings.Mobil 1 makes an excellent oil as well.Hope this helps.

 

welp,

did my 2nd oil change ever, 1st was the cobra 2 nights ago,

and now the L last night,

got some fresh 5w30 mobile one and a mobile 1 filter and she is good to go!

i'm turning into a regular mechanic, lol

 

Mobil 1 5W30 synthetic and a Motorcraft Filter, that's all I ever put in it from now on.

I don't need that $8/quart oil to run 12's. Huh Dan? LOL

 

1.Synthetics are fully campatible with conventional motor oils.

2.Synthetic oil will NOT cause leaks in seals. Synthetics may find leaks conventional oils didn't, but they will not create leaks.

3.Synthetics oils typically decrease oil consumption in engines, due to the uniform molecular size and characteristics which are predictable to very high temperatures.

4.Synthetic oils' added friction reduction and cooler temperatures can be problematic for rapid break-in of non-blueprinted engines, and have ofter been recommended for use folllowing initial break-in.

5.Synthetics can withstand longer oil-change intervals than conventional mineral oils.

6.Synthetics have the largest benefit on engines which experience extreme operation conditions: competition, hot/cold/dirty environments, or power-adders (turbos, blowers, nitirous, high-performance fuels). Synthetic use can have a considerable impact on the longevity of turbochargers.

(Got these from a magazine article called the truth about synthetic oil in GM High-Tech Performance dated January 2002.)

I use Mobil 1 5w-30 after break-in (about 5,000 mi.) but in this article they tested royal purple.

 

Terry, I have run Redline Synthetic's for 6-7 years now. I've never had any engine problems at all. My 95 cobra, while basically stock, went 130,000 miles of LA driving, and I never had the engine apart for any repair.

I changed every 15,000 whether or not it needed it. I changed the filters at 5,000, and used either Donaldson or K&N synthetic filters.

Bacause I travel so many miles, if I was changing every 3,000,it would havebeen changing oil every 3-4 weeks.